diff --git a/src/OpenGL/libGL/libGL.vcxproj b/src/OpenGL/libGL/libGL.vcxproj
index d8c182d..fc13a35 100644
--- a/src/OpenGL/libGL/libGL.vcxproj
+++ b/src/OpenGL/libGL/libGL.vcxproj
@@ -318,6 +318,7 @@
     </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\common\MatrixStack.cpp" />
     <ClCompile Include="..\common\NameSpace.cpp" />
     <ClCompile Include="..\common\Object.cpp" />
     <ClCompile Include="Buffer.cpp" />
@@ -331,7 +332,6 @@
     <ClCompile Include="IndexDataManager.cpp" />
     <ClCompile Include="libGL.cpp" />
     <ClCompile Include="main.cpp" />
-    <ClCompile Include="MatrixStack.cpp" />
     <ClCompile Include="Program.cpp" />
     <ClCompile Include="Query.cpp" />
     <ClCompile Include="Renderbuffer.cpp" />
@@ -344,6 +344,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\common\debug.h" />
+    <ClInclude Include="..\common\MatrixStack.hpp" />
     <ClInclude Include="..\common\NameSpace.hpp" />
     <ClInclude Include="..\common\Object.hpp" />
     <ClInclude Include="..\include\GL\glcorearb.h" />
@@ -360,7 +361,6 @@
     <ClInclude Include="IndexDataManager.h" />
     <ClInclude Include="main.h" />
     <ClInclude Include="mathutil.h" />
-    <ClInclude Include="MatrixStack.hpp" />
     <ClInclude Include="Program.h" />
     <ClInclude Include="Query.h" />
     <ClInclude Include="Renderbuffer.h" />