diff --git a/gtk/TreePath.custom b/gtk/TreePath.custom
index 146791a94..5d44531ba 100644
--- a/gtk/TreePath.custom
+++ b/gtk/TreePath.custom
@@ -39,3 +39,9 @@
 
 			return (Compare (o as TreePath) == 0);
 		}
+
+		public override int GetHashCode ()
+		{
+			return ToString ().GetHashCode ();
+		}
+