diff --git a/glib/Boxed.cs b/glib/Boxed.cs
index 450d4eaad..78484555b 100644
--- a/glib/Boxed.cs
+++ b/glib/Boxed.cs
@@ -22,6 +22,7 @@ namespace GLib {
 
 	using System;
 
+	[Obsolete]
 	public class Boxed {
 		object obj;
 		IntPtr raw;