diff --git a/win/win32/NetHackW.vcxproj b/win/win32/NetHackW.vcxproj
index 9305e23b9..c90ff1112 100644
--- a/win/win32/NetHackW.vcxproj
+++ b/win/win32/NetHackW.vcxproj
@@ -636,6 +636,7 @@ copy ..\sys\winnt\defaults.nh ..\binary\defaults.nh
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
+    <ClCompile Include="..\sys\share\cppregex.cpp">
     <ClCompile Include="..\win\tty\getline.c">
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
@@ -1776,4 +1777,4 @@ copy ..\sys\winnt\defaults.nh ..\binary\defaults.nh
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>