diff --git a/client/src/app_internal.h b/client/src/app_internal.h
new file mode 100644
index 00000000..961cd375
--- /dev/null
+++ b/client/src/app_internal.h
@@ -0,0 +1,27 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2025 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _H_LG_APP_INTERNAL_
+#define _H_LG_APP_INTERNAL_
+
+void app_handleKeyPressInternal(int scancode);
+void app_handleKeyReleaseInternal(int scancode);
+
+#endif
diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index f4e3f240..a2795a17 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -9,10 +9,6 @@ include_directories(
 
 add_definitions(-D_GNU_SOURCE)
 
-if(ENABLE_BACKTRACE)
-  add_definitions(-DENABLE_BACKTRACE)
-endif()
-
 if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
   add_compile_options(
     "-Wno-unknown-warning-option"
@@ -41,6 +37,10 @@ set(COMMON_SOURCES
 add_library(lg_common STATIC ${COMMON_SOURCES})
 target_link_libraries(lg_common lg_common_platform)
 
+if(ENABLE_BACKTRACE)
+  target_compile_definitions(lg_common PUBLIC -DENABLE_BACKTRACE)
+endif()
+
 target_include_directories(lg_common
   INTERFACE
     include