diff --git a/spine-csharp/spine-csharp.csproj b/spine-csharp/spine-csharp.csproj
index c766a78f4..40f697f02 100644
--- a/spine-csharp/spine-csharp.csproj
+++ b/spine-csharp/spine-csharp.csproj
@@ -71,7 +71,6 @@
     <Compile Include="src\BlendMode.cs" />
     <Compile Include="src\Bone.cs" />
     <Compile Include="src\BoneData.cs" />
-    <Compile Include="src\Collections\OrderedDictionary.cs" />
     <Compile Include="src\ConstraintData.cs" />
     <Compile Include="src\Triangulator.cs" />
     <Compile Include="src\Event.cs" />