diff --git a/pkg/msvc/msvc-2015/RetroArch-msvc2015.vcxproj b/pkg/msvc/msvc-2015/RetroArch-msvc2015.vcxproj
index cf4b8dff10..125660e728 100644
--- a/pkg/msvc/msvc-2015/RetroArch-msvc2015.vcxproj
+++ b/pkg/msvc/msvc-2015/RetroArch-msvc2015.vcxproj
@@ -390,6 +390,10 @@
       <CompileAs Condition="'$(Configuration)|$(Platform)'=='Release Cg|Win32'">CompileAsC</CompileAs>
       <CompileAs Condition="'$(Configuration)|$(Platform)'=='Debug Cg|Win32'">CompileAsC</CompileAs>
       <CompileAs Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">CompileAsC</CompileAs>
+      <CompileAs Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">CompileAsC</CompileAs>
+      <CompileAs Condition="'$(Configuration)|$(Platform)'=='Release Cg|x64'">CompileAsC</CompileAs>
+      <CompileAs Condition="'$(Configuration)|$(Platform)'=='Debug Cg|x64'">CompileAsC</CompileAs>
+      <CompileAs Condition="'$(Configuration)|$(Platform)'=='Release|x64'">CompileAsC</CompileAs>
     </ClCompile>
     <ClCompile Include="..\..\..\griffin\griffin_cpp.cpp" />
     <ClCompile Include="..\..\..\griffin\griffin_glslang.cpp" />