diff --git a/visualc/vngspice.vcxproj b/visualc/vngspice.vcxproj
index 94f377cdf..f6d2c27fb 100644
--- a/visualc/vngspice.vcxproj
+++ b/visualc/vngspice.vcxproj
@@ -1168,6 +1168,7 @@
     <ClInclude Include="..\src\spicelib\devices\cktaccept.h" />
     <ClInclude Include="..\src\spicelib\devices\cpl\cpldefs.h" />
     <ClInclude Include="..\src\spicelib\devices\cpl\cplext.h" />
+    <ClInclude Include="..\src\spicelib\devices\cpl\cplhash.h" />
     <ClInclude Include="..\src\spicelib\devices\cpl\cplinit.h" />
     <ClInclude Include="..\src\spicelib\devices\cpl\cplitf.h" />
     <ClInclude Include="..\src\spicelib\devices\csw\cswdefs.h" />