diff --git a/idd/LGIddHelper/CWidget.h b/idd/LGIddHelper/CWidget.h
index a50f5905..ff1c6f77 100644
--- a/idd/LGIddHelper/CWidget.h
+++ b/idd/LGIddHelper/CWidget.h
@@ -1,6 +1,5 @@
 #pragma once
 
-#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
 class CWidget {
diff --git a/idd/LGIddHelper/CWindow.h b/idd/LGIddHelper/CWindow.h
index 8a23d95d..30bf2f6a 100644
--- a/idd/LGIddHelper/CWindow.h
+++ b/idd/LGIddHelper/CWindow.h
@@ -1,6 +1,5 @@
 #pragma once
 
-#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <shellapi.h>
 
diff --git a/idd/LGIddHelper/LGIddHelper.vcxproj b/idd/LGIddHelper/LGIddHelper.vcxproj
index 998c8f73..f8b796af 100644
--- a/idd/LGIddHelper/LGIddHelper.vcxproj
+++ b/idd/LGIddHelper/LGIddHelper.vcxproj
@@ -75,7 +75,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;WIN32_LEAN_AND_MEAN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)LGCommon;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
@@ -99,7 +99,7 @@ copy /Y "$(ProjectDir)VERSION" "$(SolutionDir)$(Platform)\$(Configuration)\LGIdd
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;WIN32_LEAN_AND_MEAN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>$(SolutionDir)LGCommon;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
@@ -123,7 +123,7 @@ copy /Y "$(ProjectDir)VERSION" "$(SolutionDir)$(Platform)\$(Configuration)\LGIdd
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;WIN32_LEAN_AND_MEAN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>Default</LanguageStandard>
       <LanguageStandard_C>Default</LanguageStandard_C>
@@ -151,7 +151,7 @@ copy /Y "$(ProjectDir)VERSION" "$(SolutionDir)$(Platform)\$(Configuration)\LGIdd
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;WIN32_LEAN_AND_MEAN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>Default</LanguageStandard>
       <LanguageStandard_C>Default</LanguageStandard_C>