diff --git a/src/vty/fsm_vty.c b/src/vty/fsm_vty.c
index 50c7fd5..8abb9c9 100644
--- a/src/vty/fsm_vty.c
+++ b/src/vty/fsm_vty.c
@@ -2,6 +2,8 @@
  * (C) 2016 by Harald Welte <laforge@gnumonks.org>
  * All Rights Reserved
  *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or