diff --git a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/FormsDesigner/CSharpDesignerGenerator.cs b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/FormsDesigner/CSharpDesignerGenerator.cs
index ef39be8a3d..93256e6106 100644
--- a/src/AddIns/BackendBindings/CSharpBinding/Project/Src/FormsDesigner/CSharpDesignerGenerator.cs
+++ b/src/AddIns/BackendBindings/CSharpBinding/Project/Src/FormsDesigner/CSharpDesignerGenerator.cs
@@ -284,7 +284,7 @@ namespace CSharpBinding.FormsDesigner
 				return false;
 			}
 			
-			return oldType.ReflectionName != newType.BaseType;
+			return oldType.GetDefinition().ReflectionName != newType.BaseType;
 		}
 		
 		string GenerateField(CodeMemberField newField)