diff --git a/src/adv_monitor.c b/src/adv_monitor.c
index 9d2a400..dbc3b2a 100644
--- a/src/adv_monitor.c
+++ b/src/adv_monitor.c
@@ -694,6 +694,8 @@ static struct adv_monitor_app *app_create(DBusConnection *conn,
 
 	app->monitors = queue_new();
 
+	app->reg = dbus_message_ref(msg);
+
 	g_dbus_client_set_disconnect_watch(app->client, app_disconnect_cb, app);
 
 	/* Note that any property changes on a monitor object would not affect
@@ -705,8 +707,6 @@ static struct adv_monitor_app *app_create(DBusConnection *conn,
 
 	g_dbus_client_set_ready_watch(app->client, app_ready_cb, app);
 
-	app->reg = dbus_message_ref(msg);
-
 	return app;
 }
 
@@ -800,7 +800,7 @@ static DBusMessage *unregister_monitor(DBusConnection *conn,
 }
 
 static const GDBusMethodTable adv_monitor_methods[] = {
-	{ GDBUS_EXPERIMENTAL_METHOD("RegisterMonitor",
+	{ GDBUS_EXPERIMENTAL_ASYNC_METHOD("RegisterMonitor",
 					GDBUS_ARGS({ "application", "o" }),
 					NULL, register_monitor) },
 	{ GDBUS_EXPERIMENTAL_ASYNC_METHOD("UnregisterMonitor",