diff --git a/Source/Glide64/Glide64.vcxproj b/Source/Glide64/Glide64.vcxproj
index 663b12cd2..f41b62fb0 100644
--- a/Source/Glide64/Glide64.vcxproj
+++ b/Source/Glide64/Glide64.vcxproj
@@ -40,6 +40,7 @@
     <ClCompile>
       <AdditionalIncludeDirectories>$(Root)Source\3rd Party\sdl\include;$(Root)Source/3rd Party/wx/include;$(Root)Source/3rd Party/wx/include/msvc;$(Root)Source/Glitch64/inc;inc;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>__MSC__;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions Condition="'$(Platform)'=='x64'">NO_ASM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Configuration)'=='Debug'">RDP_LOGGING;RDP_ERROR_LOG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader />
     </ClCompile>