diff --git a/src/vty/logging_vty.c b/src/vty/logging_vty.c
index 9b7d10a..215394f 100644
--- a/src/vty/logging_vty.c
+++ b/src/vty/logging_vty.c
@@ -3,6 +3,8 @@
  * (C) 2009-2014 by Holger Hans Peter Freyther
  * 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