diff --git a/src/Generator/Generators/CLI/CLIMarshal.cs b/src/Generator/Generators/CLI/CLIMarshal.cs
index 5d54d878ca..76babc78ce 100644
--- a/src/Generator/Generators/CLI/CLIMarshal.cs
+++ b/src/Generator/Generators/CLI/CLIMarshal.cs
@@ -700,7 +700,7 @@ private void MarshalRefClass(Class @class)
                 Context.SupportBefore.WriteLine("if (ReferenceEquals({0}, nullptr))", Context.Parameter.Name);
                 Context.SupportBefore.WriteLineIndent(
                     "throw gcnew ::System::ArgumentNullException(\"{0}\", " +
-                    "\"{0} cannot be null because it is a C++ reference (&).\");",
+                    "\"Cannot be null because it is a C++ reference (&).\");",
                     Context.Parameter.Name);
             }
 
diff --git a/src/Generator/Generators/CSharp/CSharpMarshal.cs b/src/Generator/Generators/CSharp/CSharpMarshal.cs
index 9618b0123d..58b5533f55 100644
--- a/src/Generator/Generators/CSharp/CSharpMarshal.cs
+++ b/src/Generator/Generators/CSharp/CSharpMarshal.cs
@@ -674,7 +674,7 @@ private void MarshalRefClass(Class @class)
                             Context.SupportBefore.WriteLine("if (ReferenceEquals({0}, null))", param);
                             Context.SupportBefore.WriteLineIndent(
                                 "throw new global::System.ArgumentNullException(\"{0}\", " +
-                                "\"{0} cannot be null because it is a C++ reference (&).\");",
+                                "\"Cannot be null because it is a C++ reference (&).\");",
                                 param);
                         }
                         Context.Return.Write("{0}.{1}", param, Helpers.InstanceIdentifier);