diff --git a/PluginSystem/MatterControlPluginSystem.csproj b/PluginSystem/MatterControlPluginSystem.csproj
index da013764a..f3804a3ff 100644
--- a/PluginSystem/MatterControlPluginSystem.csproj
+++ b/PluginSystem/MatterControlPluginSystem.csproj
@@ -70,6 +70,10 @@
       <Project>{657DBC6D-C3EA-4398-A3FA-DDB73C14F71B}</Project>
       <Name>Agg</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\agg-sharp\PlatformAbstract\PlatformAbstract.csproj">
+      <Project>{3E4AABA8-D85F-4922-88C6-5C1B2D2308FB}</Project>
+      <Name>PlatformAbstract</Name>
+    </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file