diff --git a/r5dev/vproj/liblzham.vcxproj b/r5dev/vproj/liblzham.vcxproj
index 52aa1a32..8430ea1c 100644
--- a/r5dev/vproj/liblzham.vcxproj
+++ b/r5dev/vproj/liblzham.vcxproj
@@ -345,7 +345,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)..\</AdditionalIncludeDirectories>
       <FloatingPointModel>Fast</FloatingPointModel>
@@ -363,7 +363,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>
@@ -387,7 +387,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions);_PROFILE</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>
@@ -414,7 +414,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)..\</AdditionalIncludeDirectories>
       <FloatingPointModel>Precise</FloatingPointModel>
@@ -432,7 +432,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>
@@ -458,7 +458,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions);_PROFILE</PreprocessorDefinitions>
       <ConformanceMode>false</ConformanceMode>
-      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/D "_CRT_SECURE_NO_WARNINGS" /D "WIN32" %(AdditionalOptions)</AdditionalOptions>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <FavorSizeOrSpeed>Neither</FavorSizeOrSpeed>