diff --git a/client/clipboards/Wayland/src/wayland.c b/client/clipboards/Wayland/src/wayland.c
index b5035a1d..74c6a35b 100644
--- a/client/clipboards/Wayland/src/wayland.c
+++ b/client/clipboards/Wayland/src/wayland.c
@@ -171,7 +171,7 @@ static enum LG_ClipboardData mimetypeToCbType(const char * mimetype)
   return LG_CLIPBOARD_DATA_NONE;
 }
 
-static const char * wayland_cb_getName()
+static const char * wayland_cb_getName(void)
 {
   return "Wayland";
 }
@@ -327,7 +327,7 @@ static bool wayland_cb_init(
   return true;
 }
 
-static void wayland_cb_free()
+static void wayland_cb_free(void)
 {
   free(this);
   this = NULL;
@@ -425,7 +425,7 @@ static void wayland_cb_notice(LG_ClipboardRequestFn requestFn,
   this->requestFn(wayland_cb_reply_fn, NULL);
 }
 
-static void wayland_cb_release()
+static void wayland_cb_release(void)
 {
   this->requestFn = NULL;
 }
diff --git a/client/clipboards/X11/src/x11.c b/client/clipboards/X11/src/x11.c
index 6c4bde6d..ae77950e 100644
--- a/client/clipboards/X11/src/x11.c
+++ b/client/clipboards/X11/src/x11.c
@@ -57,7 +57,7 @@ static const char * atomTypes[] =
   "image/jpeg"
 };
 
-static const char * x11_cb_getName()
+static const char * x11_cb_getName(void)
 {
   return "X11";
 }
@@ -116,7 +116,7 @@ static bool x11_cb_init(
   return true;
 }
 
-static void x11_cb_free()
+static void x11_cb_free(void)
 {
   free(this);
   this = NULL;
@@ -432,7 +432,7 @@ static void x11_cb_notice(LG_ClipboardRequestFn requestFn, LG_ClipboardData type
   XFlush(this->display);
 }
 
-static void x11_cb_release()
+static void x11_cb_release(void)
 {
   this->requestFn = NULL;
   XSetSelectionOwner(this->display, XA_PRIMARY      , None, CurrentTime);
diff --git a/client/fonts/SDL/src/sdl.c b/client/fonts/SDL/src/sdl.c
index 9dbc7eba..5e80218d 100644
--- a/client/fonts/SDL/src/sdl.c
+++ b/client/fonts/SDL/src/sdl.c
@@ -150,4 +150,4 @@ struct LG_Font LGF_SDL =
   .destroy      = lgf_sdl_destroy,
   .render       = lgf_sdl_render,
   .release      = lgf_sdl_release
-};
\ No newline at end of file
+};
diff --git a/client/renderers/EGL/egl.c b/client/renderers/EGL/egl.c
index 5839bddd..127146fd 100644
--- a/client/renderers/EGL/egl.c
+++ b/client/renderers/EGL/egl.c
@@ -158,12 +158,12 @@ static struct Option egl_options[] =
 
 void update_mouse_shape(struct Inst * this);
 
-const char * egl_get_name()
+const char * egl_get_name(void)
 {
   return "EGL";
 }
 
-void egl_setup()
+void egl_setup(void)
 {
   option_register(egl_options);
 }
diff --git a/client/renderers/EGL/texture.c b/client/renderers/EGL/texture.c
index 3d9819dc..0f18e758 100644
--- a/client/renderers/EGL/texture.c
+++ b/client/renderers/EGL/texture.c
@@ -268,7 +268,7 @@ bool egl_texture_setup(EGL_Texture * texture, enum EGL_PixelFormat pixFmt, size_
   return true;
 }
 
-static void egl_warn_slow()
+static void egl_warn_slow(void)
 {
   static bool warnDone = false;
   if (!warnDone)
diff --git a/client/renderers/OpenGL/opengl.c b/client/renderers/OpenGL/opengl.c
index ed1ff659..5041c7a9 100644
--- a/client/renderers/OpenGL/opengl.c
+++ b/client/renderers/OpenGL/opengl.c
@@ -196,12 +196,12 @@ static bool draw_frame(struct Inst * this);
 static void draw_mouse(struct Inst * this);
 static void render_wait(struct Inst * this);
 
-const char * opengl_get_name()
+const char * opengl_get_name(void)
 {
   return "OpenGL";
 }
 
-static void opengl_setup()
+static void opengl_setup(void)
 {
   option_register(opengl_options);
 }
diff --git a/client/src/config.c b/client/src/config.c
index 7b14dbf6..7526f16a 100644
--- a/client/src/config.c
+++ b/client/src/config.c
@@ -396,7 +396,7 @@ static struct Option options[] =
   {0}
 };
 
-void config_init()
+void config_init(void)
 {
   params.center = true;
   params.w      = 1024;
@@ -514,12 +514,12 @@ bool config_load(int argc, char * argv[])
   return true;
 }
 
-void config_free()
+void config_free(void)
 {
   option_free();
 }
 
-static void doLicense()
+static void doLicense(void)
 {
   fprintf(stderr,
     "\n"
diff --git a/client/src/ll.c b/client/src/ll.c
index 450b5a04..e78de4aa 100644
--- a/client/src/ll.c
+++ b/client/src/ll.c
@@ -38,7 +38,7 @@ struct ll
   LG_Lock lock;
 };
 
-struct ll * ll_new()
+struct ll * ll_new(void)
 {
   struct ll * list = malloc(sizeof(struct ll));
   list->head  = NULL;
diff --git a/client/src/main.c b/client/src/main.c
index 518521d7..8561f87d 100644
--- a/client/src/main.c
+++ b/client/src/main.c
@@ -88,7 +88,7 @@ struct AppParams params = { 0 };
 static void setGrab(bool enable);
 static void setGrabQuiet(bool enable);
 
-static void lgInit()
+static void lgInit(void)
 {
   g_state.state         = APP_STATE_RUNNING;
   g_state.resizeDone    = true;
@@ -101,13 +101,13 @@ static void lgInit()
   g_cursor.guest.valid   = false;
 }
 
-static bool inputEnabled()
+static bool inputEnabled(void)
 {
   return params.useSpiceInput && !g_state.ignoreInput &&
     ((g_cursor.grab && params.captureInputOnly) || !params.captureInputOnly);
 }
 
-static void alignToGuest()
+static void alignToGuest(void)
 {
   if (SDL_HasEvent(e_SDLEvent))
     return;
@@ -120,7 +120,7 @@ static void alignToGuest()
   SDL_PushEvent(&event);
 }
 
-static void updatePositionInfo()
+static void updatePositionInfo(void)
 {
   if (g_state.haveSrcSize)
   {
@@ -709,7 +709,7 @@ static SpiceDataType clipboard_type_to_spice_type(const LG_ClipboardData type)
   }
 }
 
-void clipboardRelease()
+void clipboardRelease(void)
 {
   if (!params.clipboardToVM)
     return;
@@ -814,7 +814,7 @@ void spiceClipboardData(const SpiceDataType type, uint8_t * buffer, uint32_t siz
   }
 }
 
-void spiceClipboardRelease()
+void spiceClipboardRelease(void)
 {
   if (!params.clipboardToLocal)
     return;
@@ -915,7 +915,7 @@ static void guestCurToLocal(struct DoublePoint *local)
 // warp support. Instead, we attempt a best-effort emulation which works with a
 // 1:1 mouse movement patch applied in the guest. For anything fancy, use
 // capture mode.
-static void handleMouseWayland()
+static void handleMouseWayland(void)
 {
   if (g_cursor.guest.dpiScale == 0)
     return;
@@ -1119,7 +1119,7 @@ static void handleResizeEvent(unsigned int w, unsigned int h)
   }
 }
 
-static void handleWindowLeave()
+static void handleWindowLeave(void)
 {
   g_cursor.inWindow = false;
   g_cursor.inView   = false;
@@ -1133,7 +1133,7 @@ static void handleWindowLeave()
   g_cursor.redraw = true;
 }
 
-static void handleWindowEnter()
+static void handleWindowEnter(void)
 {
   g_cursor.inWindow = true;
   if (!inputEnabled())
@@ -1773,7 +1773,7 @@ static void key_passthrough(SDL_Scancode key, void * opaque)
   spice_key_up  (sc);
 }
 
-static void register_key_binds()
+static void register_key_binds(void)
 {
   g_state.kbFS           = app_register_keybind(SDL_SCANCODE_F     , toggle_fullscreen, NULL);
   g_state.kbVideo        = app_register_keybind(SDL_SCANCODE_V     , toggle_video     , NULL);
@@ -1799,7 +1799,7 @@ static void register_key_binds()
   g_state.kbPass[1] = app_register_keybind(SDL_SCANCODE_RGUI, key_passthrough, NULL);
 }
 
-static void release_key_binds()
+static void release_key_binds(void)
 {
   app_release_keybind(&g_state.kbFS   );
   app_release_keybind(&g_state.kbVideo);
@@ -1813,7 +1813,7 @@ static void release_key_binds()
     app_release_keybind(&g_state.kbPass[i]);
 }
 
-static void initSDLCursor()
+static void initSDLCursor(void)
 {
   const uint8_t data[4] = {0xf, 0x9, 0x9, 0xf};
   const uint8_t mask[4] = {0xf, 0xf, 0xf, 0xf};
@@ -1821,7 +1821,7 @@ static void initSDLCursor()
   SDL_SetCursor(cursor);
 }
 
-static int lg_run()
+static int lg_run(void)
 {
   memset(&g_state, 0, sizeof(g_state));
 
@@ -2218,7 +2218,7 @@ restart:
   return 0;
 }
 
-static void lg_shutdown()
+static void lg_shutdown(void)
 {
   g_state.state = APP_STATE_SHUTDOWN;
   if (t_render)
diff --git a/client/src/wm.c b/client/src/wm.c
index e05029c4..a2dfa43b 100644
--- a/client/src/wm.c
+++ b/client/src/wm.c
@@ -41,7 +41,7 @@ static void wmWaylandUngrabKeyboard();
 static void wmWaylandGrabPointer();
 static void wmWaylandUngrabPointer();
 
-void wmInit()
+void wmInit(void)
 {
   switch (g_state.wminfo.subsystem)
   {
@@ -54,7 +54,7 @@ void wmInit()
   }
 }
 
-void wmFree()
+void wmFree(void)
 {
   switch (g_state.wminfo.subsystem)
   {
@@ -67,7 +67,7 @@ void wmFree()
   }
 }
 
-void wmGrabPointer()
+void wmGrabPointer(void)
 {
   switch(g_state.wminfo.subsystem)
   {
@@ -96,7 +96,7 @@ void wmGrabPointer()
   g_wmState.pointerGrabbed = true;
 }
 
-void wmUngrabPointer()
+void wmUngrabPointer(void)
 {
   switch(g_state.wminfo.subsystem)
   {
@@ -116,7 +116,7 @@ void wmUngrabPointer()
   g_wmState.pointerGrabbed = false;
 }
 
-void wmGrabKeyboard()
+void wmGrabKeyboard(void)
 {
   switch(g_state.wminfo.subsystem)
   {
@@ -151,7 +151,7 @@ void wmGrabKeyboard()
   g_wmState.keyboardGrabbed = true;
 }
 
-void wmUngrabKeyboard()
+void wmUngrabKeyboard(void)
 {
   switch(g_state.wminfo.subsystem)
   {
@@ -174,13 +174,13 @@ void wmUngrabKeyboard()
   g_wmState.keyboardGrabbed = false;
 }
 
-void wmGrabAll()
+void wmGrabAll(void)
 {
   wmGrabPointer();
   wmGrabKeyboard();
 }
 
-void wmUngrabAll()
+void wmUngrabAll(void)
 {
   wmUngrabPointer();
   wmUngrabKeyboard();
@@ -383,7 +383,7 @@ static const struct wl_seat_listener seatListener = {
     .name = seatNameHandler,
 };
 
-void wmWaylandInit()
+void wmWaylandInit(void)
 {
   struct WMDataWayland * wm = malloc(sizeof(struct WMDataWayland));
   memset(wm, 0, sizeof(struct WMDataWayland));
@@ -418,7 +418,7 @@ static const struct zwp_relative_pointer_v1_listener relativePointerListener = {
     .relative_motion = relativePointerMotionHandler,
 };
 
-static void wmWaylandGrabPointer()
+static void wmWaylandGrabPointer(void)
 {
   struct WMDataWayland * wm = g_wmState.opaque;
 
@@ -439,7 +439,7 @@ static void wmWaylandGrabPointer()
   }
 }
 
-static void wmWaylandUngrabPointer()
+static void wmWaylandUngrabPointer(void)
 {
   struct WMDataWayland * wm = g_wmState.opaque;
 
@@ -456,7 +456,7 @@ static void wmWaylandUngrabPointer()
   }
 }
 
-static void wmWaylandGrabKeyboard()
+static void wmWaylandGrabKeyboard(void)
 {
   struct WMDataWayland * wm = g_wmState.opaque;
 
@@ -467,7 +467,7 @@ static void wmWaylandGrabKeyboard()
   }
 }
 
-static void wmWaylandUngrabKeyboard()
+static void wmWaylandUngrabKeyboard(void)
 {
   struct WMDataWayland * wm = g_wmState.opaque;
 
@@ -478,7 +478,7 @@ static void wmWaylandUngrabKeyboard()
   }
 }
 
-static void wmWaylandFree()
+static void wmWaylandFree(void)
 {
   struct WMDataWayland * wm = g_wmState.opaque;
 
diff --git a/common/include/common/time.h b/common/include/common/time.h
index 7abada18..295711ba 100644
--- a/common/include/common/time.h
+++ b/common/include/common/time.h
@@ -31,7 +31,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 
 typedef struct LGTimer LGTimer;
 
-static inline uint64_t microtime()
+static inline uint64_t microtime(void)
 {
 #if defined(_WIN32)
   static LARGE_INTEGER freq = { 0 };
@@ -50,7 +50,7 @@ static inline uint64_t microtime()
 
 #if !defined(_WIN32)
 //FIXME: make win32 versions
-static inline uint64_t nanotime()
+static inline uint64_t nanotime(void)
 {
   struct timespec time;
   clock_gettime(CLOCK_MONOTONIC_RAW, &time);
diff --git a/common/src/option.c b/common/src/option.c
index 5e03e9d8..c0b5ed66 100644
--- a/common/src/option.c
+++ b/common/src/option.c
@@ -210,7 +210,7 @@ bool option_register(struct Option options[])
   return true;
 };
 
-void option_free()
+void option_free(void)
 {
   for(int i = 0; i < state.oCount; ++i)
   {
@@ -520,7 +520,7 @@ exit:
   return result;
 }
 
-bool option_validate()
+bool option_validate(void)
 {
   if (state.doHelp)
   {
@@ -571,7 +571,7 @@ bool option_validate()
   return ok;
 }
 
-void option_print()
+void option_print(void)
 {
   printf(
     "The following is a complete list of options accepted by this application\n\n"
diff --git a/common/src/platform/linux/crash.c b/common/src/platform/linux/crash.c
index 3069f605..4ef58c96 100644
--- a/common/src/platform/linux/crash.c
+++ b/common/src/platform/linux/crash.c
@@ -54,7 +54,7 @@ struct crash
 
 static struct crash crash = {0};
 
-static void load_symbols()
+static void load_symbols(void)
 {
   bfd_init();
   crash.fd = bfd_openr(crash.exe, NULL);
@@ -131,7 +131,7 @@ static bool lookup_address(bfd_vma pc, const char ** filename, const char ** fun
   return true;
 }
 
-static void cleanup()
+static void cleanup(void)
 {
   if (crash.syms)
     free(crash.syms);
diff --git a/common/src/platform/linux/ivshmem.c b/common/src/platform/linux/ivshmem.c
index 55e56cdd..99d54132 100644
--- a/common/src/platform/linux/ivshmem.c
+++ b/common/src/platform/linux/ivshmem.c
@@ -82,7 +82,7 @@ static StringList ivshmemDeviceGetValues(struct Option * option)
   return sl;
 }
 
-void ivshmemOptionsInit()
+void ivshmemOptionsInit(void)
 {
   struct Option options[] =
   {
diff --git a/common/src/platform/linux/sysinfo.c b/common/src/platform/linux/sysinfo.c
index d73d93e5..a39dea38 100644
--- a/common/src/platform/linux/sysinfo.c
+++ b/common/src/platform/linux/sysinfo.c
@@ -20,7 +20,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include <unistd.h>
 #include <GL/glx.h>
 
-int sysinfo_gfx_max_multisample()
+int sysinfo_gfx_max_multisample(void)
 {
   Display * dpy = XOpenDisplay(NULL);
   if (!dpy)
@@ -64,7 +64,7 @@ int sysinfo_gfx_max_multisample()
   return maxSamples;
 }
 
-long sysinfo_getPageSize()
+long sysinfo_getPageSize(void)
 {
   return sysconf(_SC_PAGESIZE);
 }
\ No newline at end of file
diff --git a/common/src/platform/windows/ivshmem.c b/common/src/platform/windows/ivshmem.c
index a2c94a75..3b4e781c 100644
--- a/common/src/platform/windows/ivshmem.c
+++ b/common/src/platform/windows/ivshmem.c
@@ -33,7 +33,7 @@ struct IVSHMEMInfo
   HANDLE handle;
 };
 
-void ivshmemOptionsInit()
+void ivshmemOptionsInit(void)
 {
   static struct Option options[] = {
     {
diff --git a/common/src/platform/windows/sysinfo.c b/common/src/platform/windows/sysinfo.c
index 168b318a..dba523f6 100644
--- a/common/src/platform/windows/sysinfo.c
+++ b/common/src/platform/windows/sysinfo.c
@@ -19,13 +19,13 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 
 #include <windows.h>
 
-int sysinfo_gfx_max_multisample()
+int sysinfo_gfx_max_multisample(void)
 {
   //FIXME: Implement this
   return 4;
 }
 
-long sysinfo_getPageSize()
+long sysinfo_getPageSize(void)
 {
   SYSTEM_INFO si;
   GetSystemInfo(&si);
diff --git a/common/src/platform/windows/windebug.c b/common/src/platform/windows/windebug.c
index a24f646f..a4969601 100644
--- a/common/src/platform/windows/windebug.c
+++ b/common/src/platform/windows/windebug.c
@@ -58,7 +58,7 @@ inline static BOOL CompareWindowsVersion(DWORD dwMajorVersion, DWORD dwMinorVers
   return VerifyVersionInfo(&ver, VER_MAJORVERSION | VER_MINORVERSION, dwlConditionMask);
 }
 
-bool IsWindows8()
+bool IsWindows8(void)
 {
   return
     (CompareWindowsVersion(6, 3) == TRUE) ||
diff --git a/host/platform/Linux/capture/XCB/src/xcb.c b/host/platform/Linux/capture/XCB/src/xcb.c
index 92f6df87..9ac70ba9 100644
--- a/host/platform/Linux/capture/XCB/src/xcb.c
+++ b/host/platform/Linux/capture/XCB/src/xcb.c
@@ -57,12 +57,12 @@ static unsigned int xcb_getMaxFrameSize();
 
 // implementation
 
-static const char * xcb_getName()
+static const char * xcb_getName(void)
 {
   return "XCB";
 }
 
-static bool xcb_create()
+static bool xcb_create(void)
 {
   assert(!this);
   this             = (struct xcb *)calloc(sizeof(struct xcb), 1);
@@ -80,7 +80,7 @@ static bool xcb_create()
   return true;
 }
 
-static bool xcb_init()
+static bool xcb_init(void)
 {
   assert(this);
   assert(!this->initialized);
@@ -131,7 +131,7 @@ fail:
   return false;
 }
 
-static bool xcb_deinit()
+static bool xcb_deinit(void)
 {
   assert(this);
 
@@ -157,24 +157,24 @@ static bool xcb_deinit()
   return false;
 }
 
-static void xcb_free()
+static void xcb_free(void)
 {
   lgFreeEvent(this->frameEvent);
   free(this);
   this = NULL;
 }
 
-static unsigned int xcb_getMaxFrameSize()
+static unsigned int xcb_getMaxFrameSize(void)
 {
   return this->width * this->height * 4;
 }
 
-static unsigned int xcb_getMouseScale()
+static unsigned int xcb_getMouseScale(void)
 {
   return 100;
 }
 
-static CaptureResult xcb_capture()
+static CaptureResult xcb_capture(void)
 {
   assert(this);
   assert(this->initialized);
diff --git a/host/platform/Linux/src/platform.c b/host/platform/Linux/src/platform.c
index afe371bc..2111138a 100644
--- a/host/platform/Linux/src/platform.c
+++ b/host/platform/Linux/src/platform.c
@@ -54,18 +54,18 @@ void sigHandler(int signo)
   app_quit();
 }
 
-bool app_init()
+bool app_init(void)
 {
   signal(SIGINT, sigHandler);
   return true;
 }
 
-const char * os_getExecutable()
+const char * os_getExecutable(void)
 {
   return app.executable;
 }
 
-const char * os_getDataPath()
+const char * os_getDataPath(void)
 {
   return app.dataPath;
 }
diff --git a/host/platform/Windows/capture/DXGI/src/dxgi.c b/host/platform/Windows/capture/DXGI/src/dxgi.c
index ac87315b..80e127cf 100644
--- a/host/platform/Windows/capture/DXGI/src/dxgi.c
+++ b/host/platform/Windows/capture/DXGI/src/dxgi.c
@@ -114,12 +114,12 @@ static CaptureResult dxgi_releaseFrame();
 
 // implementation
 
-static const char * dxgi_getName()
+static const char * dxgi_getName(void)
 {
   return "DXGI";
 }
 
-static void dxgi_initOptions()
+static void dxgi_initOptions(void)
 {
   struct Option options[] =
   {
@@ -186,7 +186,7 @@ static bool dxgi_create(CaptureGetPointerBuffer getPointerBufferFn, CapturePostP
   return true;
 }
 
-static bool dxgi_init()
+static bool dxgi_init(void)
 {
   assert(this);
 
@@ -572,12 +572,12 @@ fail:
   return false;
 }
 
-static void dxgi_stop()
+static void dxgi_stop(void)
 {
   this->stop = true;
 }
 
-static bool dxgi_deinit()
+static bool dxgi_deinit(void)
 {
   assert(this);
 
@@ -653,7 +653,7 @@ static bool dxgi_deinit()
   return true;
 }
 
-static void dxgi_free()
+static void dxgi_free(void)
 {
   assert(this);
 
@@ -666,7 +666,7 @@ static void dxgi_free()
   this = NULL;
 }
 
-static unsigned int dxgi_getMaxFrameSize()
+static unsigned int dxgi_getMaxFrameSize(void)
 {
   assert(this);
   assert(this->initialized);
@@ -674,7 +674,7 @@ static unsigned int dxgi_getMaxFrameSize()
   return this->height * this->pitch;
 }
 
-static unsigned int dxgi_getMouseScale()
+static unsigned int dxgi_getMouseScale(void)
 {
   assert(this);
   assert(this->initialized);
@@ -701,7 +701,7 @@ static CaptureResult dxgi_hResultToCaptureResult(const HRESULT status)
   }
 }
 
-static CaptureResult dxgi_capture()
+static CaptureResult dxgi_capture(void)
 {
   assert(this);
   assert(this->initialized);
@@ -950,7 +950,7 @@ static CaptureResult dxgi_getFrame(FrameBuffer * frame)
   return CAPTURE_RESULT_OK;
 }
 
-static CaptureResult dxgi_releaseFrame()
+static CaptureResult dxgi_releaseFrame(void)
 {
   assert(this);
   if (!this->needsRelease)
diff --git a/host/platform/Windows/capture/NVFBC/src/nvfbc.c b/host/platform/Windows/capture/NVFBC/src/nvfbc.c
index cc63c159..c8255e73 100644
--- a/host/platform/Windows/capture/NVFBC/src/nvfbc.c
+++ b/host/platform/Windows/capture/NVFBC/src/nvfbc.c
@@ -89,12 +89,12 @@ static void on_mouseMove(int x, int y)
   lgSignalEvent(this->cursorEvents[0]);
 }
 
-static const char * nvfbc_getName()
+static const char * nvfbc_getName(void)
 {
   return "NVFBC (NVidia Frame Buffer Capture)";
 };
 
-static void nvfbc_initOptions()
+static void nvfbc_initOptions(void)
 {
   struct Option options[] =
   {
@@ -163,7 +163,7 @@ static bool nvfbc_create(
   return true;
 }
 
-static bool nvfbc_init()
+static bool nvfbc_init(void)
 {
   this->stop = false;
   getDesktopSize(&this->width, &this->height, &this->dpi);
@@ -205,7 +205,7 @@ static bool nvfbc_init()
   return true;
 }
 
-static void nvfbc_stop()
+static void nvfbc_stop(void)
 {
   this->stop = true;
   lgSignalEvent(this->cursorEvents[0]);
@@ -218,7 +218,7 @@ static void nvfbc_stop()
   }
 }
 
-static bool nvfbc_deinit()
+static bool nvfbc_deinit(void)
 {
   mouseHook_remove();
 
@@ -231,7 +231,7 @@ static bool nvfbc_deinit()
   return true;
 }
 
-static void nvfbc_free()
+static void nvfbc_free(void)
 {
   NvFBCToSysRelease(&this->nvfbc);
 
@@ -243,17 +243,17 @@ static void nvfbc_free()
   NvFBCFree();
 }
 
-static unsigned int nvfbc_getMaxFrameSize()
+static unsigned int nvfbc_getMaxFrameSize(void)
 {
   return this->maxWidth * this->maxHeight * 4;
 }
 
-static unsigned int nvfbc_getMouseScale()
+static unsigned int nvfbc_getMouseScale(void)
 {
   return this->dpi * 100 / DPI_100_PERCENT;
 }
 
-static CaptureResult nvfbc_capture()
+static CaptureResult nvfbc_capture(void)
 {
   getDesktopSize(&this->width, &this->height, &this->dpi);
   NvFBCFrameGrabInfo grabInfo;
diff --git a/host/platform/Windows/src/mousehook.c b/host/platform/Windows/src/mousehook.c
index 369696eb..05df50d8 100644
--- a/host/platform/Windows/src/mousehook.c
+++ b/host/platform/Windows/src/mousehook.c
@@ -47,7 +47,7 @@ void mouseHook_install(MouseHookFn callback)
   sendAppMessage(WM_CALL_FUNCTION, 0, (LPARAM)&cf);
 }
 
-void mouseHook_remove()
+void mouseHook_remove(void)
 {
   struct MSG_CALL_FUNCTION cf;
   cf.fn     = msg_callback;
diff --git a/host/platform/Windows/src/platform.c b/host/platform/Windows/src/platform.c
index 9c522395..4d232835 100644
--- a/host/platform/Windows/src/platform.c
+++ b/host/platform/Windows/src/platform.c
@@ -66,7 +66,7 @@ static ZwSetTimerResolution_t ZwSetTimerResolution = NULL;
 typedef WINBOOL WINAPI (*PChangeWindowMessageFilterEx)(HWND hwnd, UINT message, DWORD action, void * pChangeFilterStruct);
 PChangeWindowMessageFilterEx _ChangeWindowMessageFilterEx = NULL;
 
-static void RegisterTrayIcon()
+static void RegisterTrayIcon(void)
 {
   // register our TrayIcon
   if (!app.iconData.cbSize)
@@ -320,7 +320,7 @@ finish:
   return result;
 }
 
-bool app_init()
+bool app_init(void)
 {
   const char * logFile   = option_get_string("os", "logFile"  );
 
@@ -346,12 +346,12 @@ bool app_init()
   return true;
 }
 
-const char * os_getExecutable()
+const char * os_getExecutable(void)
 {
   return app.executable;
 }
 
-const char * os_getDataPath()
+const char * os_getDataPath(void)
 {
   static char path[MAX_PATH] = { 0 };
   if (!path[0])
@@ -369,7 +369,7 @@ const char * os_getDataPath()
   return path;
 }
 
-HWND os_getMessageWnd()
+HWND os_getMessageWnd(void)
 {
   return app.messageWnd;
 }
diff --git a/host/platform/Windows/src/service.c b/host/platform/Windows/src/service.c
index f148c778..48280c9c 100644
--- a/host/platform/Windows/src/service.c
+++ b/host/platform/Windows/src/service.c
@@ -73,7 +73,7 @@ void doLog(const char * fmt, ...)
   va_end(args);
 }
 
-static bool setupAPI()
+static bool setupAPI(void)
 {
   /* first look in kernel32.dll */
   HMODULE mod;
@@ -99,7 +99,7 @@ static bool setupAPI()
   return false;
 }
 
-static void setupLogging()
+static void setupLogging(void)
 {
   char tempPath[MAX_PATH+1];
   GetTempPathA(sizeof(tempPath), tempPath);
@@ -110,13 +110,13 @@ static void setupLogging()
   doLog("Startup\n");
 }
 
-static void finishLogging()
+static void finishLogging(void)
 {
   doLog("Finished\n");
   fclose(service.logFile);
 }
 
-void winerr()
+void winerr(void)
 {
   char buf[256];
   FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
@@ -172,7 +172,7 @@ fail:
   return false;
 }
 
-HANDLE dupeSystemProcessToken()
+HANDLE dupeSystemProcessToken(void)
 {
   DWORD count = 0;
   DWORD returned;
@@ -235,7 +235,7 @@ err_proc:
   return NULL;
 }
 
-DWORD GetInteractiveSessionID()
+DWORD GetInteractiveSessionID(void)
 {
   PWTS_SESSION_INFO pSessionInfo;
   DWORD count;
@@ -258,7 +258,7 @@ DWORD GetInteractiveSessionID()
   return ret;
 }
 
-void Launch()
+void Launch(void)
 {
   if (!setupAPI())
   {
@@ -392,7 +392,7 @@ VOID SvcReportEvent(LPTSTR szFunction)
   }
 }
 
-void Install()
+void Install(void)
 {
   TCHAR szPath[MAX_PATH];
 
@@ -488,7 +488,7 @@ void Install()
   CloseServiceHandle(schSCManager);
 }
 
-void Uninstall()
+void Uninstall(void)
 {
   SC_HANDLE schSCManager;
   SC_HANDLE schService;
diff --git a/host/src/app.c b/host/src/app.c
index 335cddea..5486b4cc 100644
--- a/host/src/app.c
+++ b/host/src/app.c
@@ -212,7 +212,7 @@ static int frameThread(void * opaque)
   return 0;
 }
 
-bool startThreads()
+bool startThreads(void)
 {
   app.state = APP_STATE_RUNNING;
   if (!lgCreateThread("FrameThread", frameThread, NULL, &app.frameThread))
@@ -224,7 +224,7 @@ bool startThreads()
   return true;
 }
 
-bool stopThreads()
+bool stopThreads(void)
 {
   bool ok = true;
 
@@ -242,7 +242,7 @@ bool stopThreads()
   return ok;
 }
 
-static bool captureStart()
+static bool captureStart(void)
 {
   if (app.state == APP_STATE_IDLE)
   {
@@ -265,7 +265,7 @@ static bool captureStart()
   return startThreads();
 }
 
-static bool captureStop()
+static bool captureStop(void)
 {
   DEBUG_INFO("==== [ Capture Stop ] ====");
   if (!stopThreads())
@@ -280,7 +280,7 @@ static bool captureStop()
   return true;
 }
 
-static bool captureRestart()
+static bool captureRestart(void)
 {
   return captureStop() && captureStart();
 }
@@ -639,7 +639,7 @@ fail:
   return exitcode;
 }
 
-void app_quit()
+void app_quit(void)
 {
   app.state = APP_STATE_SHUTDOWN;
 }
diff --git a/module/test.c b/module/test.c
index b384cc18..66a3f51e 100644
--- a/module/test.c
+++ b/module/test.c
@@ -11,7 +11,7 @@
 
 #include "kvmfr.h"
 
-int main()
+int main(void)
 {
   int fd = open("/dev/kvmfr0", O_RDWR);
   if (fd < 0)
diff --git a/profile/client/src/main.c b/profile/client/src/main.c
index dd9a98aa..0050b026 100644
--- a/profile/client/src/main.c
+++ b/profile/client/src/main.c
@@ -104,7 +104,7 @@ static bool config_load(int argc, char * argv[])
   return true;
 }
 
-static int run()
+static int run(void)
 {
   PLGMPClient      lgmp;
   PLGMPClientQueue frameQueue;