diff --git a/build/msw/wx_html.vcxproj b/build/msw/wx_html.vcxproj
index df3a22b264..5d421cb9fe 100644
--- a/build/msw/wx_html.vcxproj
+++ b/build/msw/wx_html.vcxproj
@@ -482,6 +482,7 @@
     <ClCompile Include="..\..\src\html\m_tables.cpp" />
     <ClCompile Include="..\..\src\html\styleparams.cpp" />
     <ClCompile Include="..\..\src\html\winpars.cpp" />
+    <ClCompile Include="..\..\src\html\chm.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="..\..\src\msw\version.rc">
diff --git a/build/msw/wx_html.vcxproj.filters b/build/msw/wx_html.vcxproj.filters
index 5284e0aac3..4249c9751a 100644
--- a/build/msw/wx_html.vcxproj.filters
+++ b/build/msw/wx_html.vcxproj.filters
@@ -33,6 +33,9 @@
     <ClCompile Include="..\..\src\generic\htmllbox.cpp">
       <Filter>Generic Sources</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\src\html\chm.cpp">
+      <Filter>wxHTML Sources</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\src\html\helpctrl.cpp">
       <Filter>wxHTML Sources</Filter>
     </ClCompile>