diff --git a/Source/Glide64/Glide64.vcproj b/Source/Glide64/Glide64.vcproj
index f3ae5269d..c40beec55 100644
--- a/Source/Glide64/Glide64.vcproj
+++ b/Source/Glide64/Glide64.vcproj
@@ -38,7 +38,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="&quot;$(Root)Source/3rd Party/wx/include&quot;;&quot;$(Root)Source/3rd Party/wx/include/msvc&quot;;inc"
-				PreprocessorDefinitions="__MSC__;RDP_LOGGING;"
+				PreprocessorDefinitions="__MSC__;RDP_LOGGING;RDP_ERROR_LOG;"
 				UsePrecompiledHeader="0"
 			/>
 			<Tool
diff --git a/Source/Glide64/Glide64.vcxproj b/Source/Glide64/Glide64.vcxproj
index 801eda196..a258c7311 100644
--- a/Source/Glide64/Glide64.vcxproj
+++ b/Source/Glide64/Glide64.vcxproj
@@ -49,7 +49,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <AdditionalIncludeDirectories>$(Root)Source/3rd Party/wx/include;$(Root)Source/3rd Party/wx/include/msvc;inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>__MSC__;RDP_LOGGING;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>__MSC__;RDP_LOGGING;RDP_ERROR_LOG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader />
     </ClCompile>
     <Link>