diff --git a/src/gsm/milenage/aes_wrap.h b/src/gsm/milenage/aes_wrap.h
index 7d4d5d9..b644d4c 100644
--- a/src/gsm/milenage/aes_wrap.h
+++ b/src/gsm/milenage/aes_wrap.h
@@ -17,6 +17,8 @@
  * Alternatively, this software may be distributed under the terms of BSD
  * license.
  *
+ * SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+ *
  * See README and COPYING for more details.
  */