diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index 63ee167..acb2db0 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -6,6 +6,8 @@
  *
  * All Rights Reserved
  *
+ * SPDX-License-Identifier: AGPL-3.0+
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or