diff --git a/src/xpdev/xpdev_mt.vcxproj b/src/xpdev/xpdev_mt.vcxproj
index 740e2f304e9e684e21cda5adf0c561dbe30288f2..a51f86dbd9ece0b9a5a49c35509ef194363463e8 100644
--- a/src/xpdev/xpdev_mt.vcxproj
+++ b/src/xpdev/xpdev_mt.vcxproj
@@ -164,6 +164,7 @@
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
+    <ClCompile Include="rwlockwrap.c" />
     <ClCompile Include="semfile.c">
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -220,4 +221,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>