diff --git a/src/windows/Stella.vcxproj b/src/windows/Stella.vcxproj
index 97d8c3286..6aa902085 100644
--- a/src/windows/Stella.vcxproj
+++ b/src/windows/Stella.vcxproj
@@ -283,6 +283,7 @@
     <ClCompile Include="..\emucore\CartDF.cxx" />
     <ClCompile Include="..\emucore\CartDFSC.cxx" />
     <ClCompile Include="..\emucore\CartFA2.cxx" />
+    <ClCompile Include="..\emucore\CartMDM.cxx" />
     <ClCompile Include="..\emucore\CompuMate.cxx" />
     <ClCompile Include="..\emucore\FBSurface.cxx" />
     <ClCompile Include="..\emucore\MindLink.cxx" />
@@ -541,6 +542,7 @@
     <ClInclude Include="..\emucore\CartDF.hxx" />
     <ClInclude Include="..\emucore\CartDFSC.hxx" />
     <ClInclude Include="..\emucore\CartFA2.hxx" />
+    <ClInclude Include="..\emucore\CartMDM.hxx" />
     <ClInclude Include="..\emucore\CompuMate.hxx" />
     <ClInclude Include="..\emucore\FBSurface.hxx" />
     <ClInclude Include="..\emucore\MindLink.hxx" />
diff --git a/src/windows/Stella.vcxproj.filters b/src/windows/Stella.vcxproj.filters
index 1ea5a8f43..b4b65104d 100644
--- a/src/windows/Stella.vcxproj.filters
+++ b/src/windows/Stella.vcxproj.filters
@@ -771,6 +771,9 @@
     <ClCompile Include="..\debugger\gui\CartDASHWidget.cxx">
       <Filter>Source Files\debugger</Filter>
     </ClCompile>
+    <ClCompile Include="..\emucore\CartMDM.cxx">
+      <Filter>Source Files\emucore</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\common\Array.hxx">
@@ -1556,6 +1559,9 @@
     <ClInclude Include="..\debugger\gui\CartDASHWidget.hxx">
       <Filter>Header Files\debugger</Filter>
     </ClInclude>
+    <ClInclude Include="..\emucore\CartMDM.hxx">
+      <Filter>Header Files\emucore</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="stella.ico">