diff --git a/platforms/windows/Gearsystem.vcxproj b/platforms/windows/Gearsystem.vcxproj
index de16c92c..50ed9898 100644
--- a/platforms/windows/Gearsystem.vcxproj
+++ b/platforms/windows/Gearsystem.vcxproj
@@ -16,6 +16,7 @@
     <ClCompile Include="..\..\src\audio\Effects_Buffer.cpp" />
     <ClCompile Include="..\..\src\audio\Multi_Buffer.cpp" />
     <ClCompile Include="..\..\src\audio\Sms_Apu.cpp" />
+    <ClCompile Include="..\..\src\audio\emu2413\emu2413.c" />
     <ClCompile Include="..\..\src\BootromMemoryRule.cpp" />
     <ClCompile Include="..\..\src\Cartridge.cpp" />
     <ClCompile Include="..\..\src\CodemastersMemoryRule.cpp" />