diff -Nur old/dbus/dbus-gmain.c new/dbus/dbus-gmain.c
--- old/dbus/dbus-gmain.c	2010-02-05 00:46:58.000000000 +0800
+++ new/dbus/dbus-gmain.c	2010-08-19 14:18:34.000000000 +0800
@@ -250,7 +250,6 @@
   if (!dbus_watch_get_enabled (watch))
     return;
   
-  g_assert (dbus_watch_get_data (watch) == NULL);
   
   flags = dbus_watch_get_flags (watch);