diff --git a/sys/arm/allwinner/aw_syscon.c b/sys/arm/allwinner/aw_syscon.c
index 5eb8b7c8febe..911860d2305e 100644
--- a/sys/arm/allwinner/aw_syscon.c
+++ b/sys/arm/allwinner/aw_syscon.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
  * All rights reserved.
  *