diff --git a/src/Generator/Generators/CSharp/CSharpTextTemplate.cs b/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
index 241b24b7..b8ffda15 100644
--- a/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
+++ b/src/Generator/Generators/CSharp/CSharpTextTemplate.cs
@@ -1450,7 +1450,7 @@ namespace CppSharp.Generators.CSharp
                 var param = new Parameter
                 {
                     Name = Helpers.ReturnIdentifier,
-                    QualifiedType = method.ReturnType
+                    QualifiedType = method.OriginalReturnType
                 };
 
                 // Marshal the managed result to native