diff --git a/src/vdmodem/vdmodem.vcxproj b/src/vdmodem/vdmodem.vcxproj
index 6014006e575460cab7bbfc8aeb56950c571de0b3..4434eab432f59d0a9152ce4f67f417aba92fbd51 100644
--- a/src/vdmodem/vdmodem.vcxproj
+++ b/src/vdmodem/vdmodem.vcxproj
@@ -171,6 +171,7 @@
   <ItemGroup>
     <ClCompile Include="..\encode\utf8.c" />
     <ClCompile Include="..\sbbs3\findstr.c" />
+    <ClCompile Include="..\sbbs3\nopen.c" />
     <ClCompile Include="..\sbbs3\str_util.c" />
     <ClCompile Include="..\sbbs3\telnet.c" />
     <ClCompile Include="vdmodem.c" />