diff --git a/sources/custom/Bus.cs b/sources/custom/Bus.cs
new file mode 100644
index 0000000000..012518912a
--- /dev/null
+++ b/sources/custom/Bus.cs
@@ -0,0 +1,29 @@
+// Copyright (C) 2013  Bertrand Lorentz <bertrand.lorentz@gmail.com>
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+
+namespace Gst
+{
+	partial class Bus
+	{
+		public uint AddWatch (Gst.BusFunc func) {
+			// https://developer.gnome.org/glib/unstable/glib-The-Main-Event-Loop.html#G-PRIORITY-DEFAULT:CAPS
+			int G_PRIORITY_DEFAULT = 0;
+			return AddWatchFull (G_PRIORITY_DEFAULT, func);
+		}
+	}
+}
+