diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index 5ce792d..e703e3e 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -437,7 +437,7 @@
 
             public delegate CallError grpcsharp_test_callback_delegate([MarshalAs(UnmanagedType.FunctionPtr)] OpCompletionDelegate callback);
             public delegate IntPtr grpcsharp_test_nop_delegate(IntPtr ptr);
-            public delegate void grpcsharp_test_override_method(string methodName, string variant);
+            public delegate void grpcsharp_test_override_method_delegate(string methodName, string variant);
         }
     }
 }