dbus_g_object_register_marshaller (g_cclosure_marshal_VOID__POINTER,
					   G_TYPE_NONE, G_TYPE_POINTER, G_TYPE_INVALID);

	dbus_g_proxy_add_signal (spm_proxy, "StatusChanged",
				 G_TYPE_POINTER, G_TYPE_INVALID);

	dbus_g_proxy_connect_signal (spm_proxy, "StatusChanged",
				     G_CALLBACK (dbus_spm_status_changed_cb),
				     NULL, NULL);