diff --git a/Source/OpenTK/OpenTK.csproj b/Source/OpenTK/OpenTK.csproj
index b87e00b5..2ec62fd8 100644
--- a/Source/OpenTK/OpenTK.csproj
+++ b/Source/OpenTK/OpenTK.csproj
@@ -786,8 +786,10 @@
   </PropertyGroup>
   <ItemGroup />
   <Target Name="AfterBuild">
-    <Exec Command="$(OutputPath)..\..\Tools\$(Configuration)\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) == 'Windows_NT'" />
-    <Exec Command="mono $(OutputPath)..\..\Tools\$(Configuration)\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) != 'Windows_NT'" />
+    <Exec Command="$(OutputPath)..\..\Tools\Debug\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) == 'Windows_NT' and $(Configuration) == 'Debug'" />
+    <Exec Command="$(OutputPath)..\..\Tools\Release\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) == 'Windows_NT' and $(Configuration) != 'Debug'" />
+    <Exec Command="mono $(OutputPath)..\..\Tools\Debug\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) != 'Windows_NT' and $(Configuration) == 'Debug'" />
+    <Exec Command="mono $(OutputPath)..\..\Tools\Release\Rewrite.exe $(OutputPath)OpenTK.dll ..\..\OpenTK.snk" Condition="$(OS) != 'Windows_NT' and $(Configuration) != 'Debug'" />
   </Target>
   <ProjectExtensions>
     <MonoDevelop>