diff --git a/AppleWinExpress2010.vcxproj b/AppleWinExpress2010.vcxproj
index 402ad15e..447777fb 100644
--- a/AppleWinExpress2010.vcxproj
+++ b/AppleWinExpress2010.vcxproj
@@ -265,6 +265,7 @@
     <ClCompile Include="source\Debugger\Debugger_Parser.cpp" />
     <ClCompile Include="source\Debugger\Debugger_Range.cpp" />
     <ClCompile Include="source\Debugger\Debugger_Symbols.cpp" />
+    <ClCompile Include="source\DiskFormatTrack.cpp" />
     <ClCompile Include="source\NTSC.cpp" />
     <ClCompile Include="source\NTSC_CharSet.cpp" />
     <ClCompile Include="source\SAM.cpp" />
@@ -564,4 +565,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>
\ No newline at end of file