diff --git a/platform/Windows/eduke32.vcxproj b/platform/Windows/eduke32.vcxproj
index b198a7c82..69f193e07 100644
--- a/platform/Windows/eduke32.vcxproj
+++ b/platform/Windows/eduke32.vcxproj
@@ -294,10 +294,10 @@
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="..\..\source\duke3d\rsrc\gameres.rc">
-      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(PreprocessorDefinitions);POLYMER=1</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(PreprocessorDefinitions);POLYMER=1</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(PreprocessorDefinitions);POLYMER=1</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">%(PreprocessorDefinitions);POLYMER=1</PreprocessorDefinitions>
     </ResourceCompile>
   </ItemGroup>
   <ItemGroup>