diff --git a/compiler/cpp/compiler.vcxproj b/compiler/cpp/compiler.vcxproj
index f46aaab..6fe2d9d 100644
--- a/compiler/cpp/compiler.vcxproj
+++ b/compiler/cpp/compiler.vcxproj
@@ -45,7 +45,7 @@
     <ClInclude Include="src\parse\t_type.h" />
     <ClInclude Include="src\parse\t_typedef.h" />
     <ClInclude Include="src\platform.h" />
-    <ClInclude Include="src\thrifty.h" />
+    <ClInclude Include="src\thrifty.hh" />
     <ClInclude Include="src\windows\config.h" />
     <ClInclude Include="src\windows\version.h" />
   </ItemGroup>
@@ -166,7 +166,7 @@
     </Link>
     <PreBuildEvent>
       <Command>flex -o "src\\thriftl.cc" src/thriftl.ll
-bison -y -o "src\thrifty.cc" --defines="src/thrifty.h" src/thrifty.yy</Command>
+bison -y -o "src\thrifty.cc" --defines="src/thrifty.hh" src/thrifty.yy</Command>
     </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -185,7 +185,7 @@
     </Link>
     <PreBuildEvent>
       <Command>flex -o "src\thriftl.cc" src/thriftl.ll
-bison -y -o "src\thrifty.cc" --defines="src/thrifty.h" src/thrifty.yy</Command>
+bison -y -o "src\thrifty.cc" --defines="src/thrifty.hh" src/thrifty.yy</Command>
     </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -208,7 +208,7 @@
     </Link>
     <PreBuildEvent>
       <Command>flex -o "src\thriftl.cc" src/thriftl.ll
-bison -y -o "src\thrifty.cc" --defines="src/thrifty.h" src/thrifty.yy</Command>
+bison -y -o "src\thrifty.cc" --defines="src/thrifty.hh" src/thrifty.yy</Command>
     </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -231,7 +231,7 @@
     </Link>
     <PreBuildEvent>
       <Command>flex -o "src\thriftl.cc" src/thriftl.ll
-bison -y -o "src\thrifty.cc" --defines="src/thrifty.h" src/thrifty.yy</Command>
+bison -y -o "src\thrifty.cc" --defines="src/thrifty.hh" src/thrifty.yy</Command>
     </PreBuildEvent>
   </ItemDefinitionGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />