diff --git a/VS2017/chatscript.vcxproj b/VS2017/chatscript.vcxproj
index 8da8da6f..1ead9f93 100644
--- a/VS2017/chatscript.vcxproj
+++ b/VS2017/chatscript.vcxproj
@@ -71,7 +71,7 @@
     <ClCompile Include="..\SRC\csocket.cpp" />
     <ClCompile Include="..\SRC\cs_ev.c" />
     <ClCompile Include="..\SRC\dictionarySystem.cpp" />
-    <ClCompile Include="..\SRC\duktape\duktape.c" />
+    <ClCompile Include="..\SRC\duktape\duktape.cpp" />
     <ClCompile Include="..\SRC\english.cpp" />
     <ClCompile Include="..\SRC\englishtagger.cpp" />
     <ClCompile Include="..\SRC\evserver.cpp" />
diff --git a/VS2017/chatscript.vcxproj.filters b/VS2017/chatscript.vcxproj.filters
index 2635831e..5fa09244 100644
--- a/VS2017/chatscript.vcxproj.filters
+++ b/VS2017/chatscript.vcxproj.filters
@@ -221,7 +221,7 @@
     <ClCompile Include="..\SRC\postgres.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\SRC\duktape\duktape.c">
+    <ClCompile Include="..\SRC\duktape\duktape.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
   </ItemGroup>