diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index bdd367a11f..5bbdcae4d5 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -780,6 +780,7 @@
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC3.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC6.cs" />
     <Compile Include="Consoles\Nintendo\NES\Boards\VRC7.cs" />
+		<Compile Include="Consoles\Nintendo\NES\Boards\VS_M99.cs" />
     <Compile Include="Consoles\Nintendo\NES\BisqAPU.cs" />
     <Compile Include="Consoles\Nintendo\NES\FDS\FDS.cs" />
     <Compile Include="Consoles\Nintendo\NES\FDS\FDSAudio.cs" />
@@ -1190,4 +1191,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
\ No newline at end of file
+</Project>