diff --git a/dotnet/rubberband-library.vcxproj b/dotnet/rubberband-library.vcxproj
index 3f84bb1..816c8be 100644
--- a/dotnet/rubberband-library.vcxproj
+++ b/dotnet/rubberband-library.vcxproj
@@ -157,6 +157,7 @@
     <ClCompile Include="..\src\common\Allocators.cpp" />
     <ClCompile Include="..\src\common\StretchCalculator.cpp" />
     <ClCompile Include="..\src\common\sysutils.cpp" />
+    <ClCompile Include="..\src\common\mathmisc.cpp" />
     <ClCompile Include="..\src\common\Thread.cpp" />
     <ClCompile Include="..\src\finer\R3Stretcher.cpp" />
   </ItemGroup>