diff --git a/glib/ParamSpec.cs b/glib/ParamSpec.cs
index 74134eaf8..f75e99d78 100644
--- a/glib/ParamSpec.cs
+++ b/glib/ParamSpec.cs
@@ -116,7 +116,7 @@ namespace GLib {
 			}
 		}
 
-		public string ToString ()
+		public override string ToString ()
 		{
 			GParamSpec spec = (GParamSpec) Marshal.PtrToStructure (Handle, typeof (GParamSpec));
 			GType valtype= new GType (spec.value_type);