diff --git a/build_ide/VS2010/flatc.vcxproj b/build_ide/VS2010/flatc.vcxproj
index e804ed332..31cd01345 100755
--- a/build_ide/VS2010/flatc.vcxproj
+++ b/build_ide/VS2010/flatc.vcxproj
@@ -263,6 +263,7 @@
     </ProjectReference>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\src\util.cpp" />
     <ClInclude Include="..\..\include\flatbuffers\flatbuffers.h" />
     <ClInclude Include="..\..\include\flatbuffers\idl.h" />
     <ClInclude Include="..\..\include\flatbuffers\util.h" />
diff --git a/build_ide/VS2010/flatsampletext.vcxproj b/build_ide/VS2010/flatsampletext.vcxproj
index 2519e50c8..95a6a351f 100755
--- a/build_ide/VS2010/flatsampletext.vcxproj
+++ b/build_ide/VS2010/flatsampletext.vcxproj
@@ -263,6 +263,7 @@
     </ProjectReference>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\src\util.cpp" />
     <ClInclude Include="..\..\include\flatbuffers\flatbuffers.h" />
     <ClInclude Include="..\..\include\flatbuffers\idl.h" />
     <ClInclude Include="..\..\include\flatbuffers\util.h" />
diff --git a/build_ide/VS2010/flattests.vcxproj b/build_ide/VS2010/flattests.vcxproj
index 24dca0b36..511aa66e1 100755
--- a/build_ide/VS2010/flattests.vcxproj
+++ b/build_ide/VS2010/flattests.vcxproj
@@ -273,6 +273,7 @@
     <ClCompile Include="..\..\src\idl_parser.cpp" />
     <ClCompile Include="..\..\src\idl_gen_text.cpp" />
     <ClCompile Include="..\..\src\reflection.cpp" />
+    <ClCompile Include="..\..\src\util.cpp" />
     <ClCompile Include="..\..\tests\test.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />