diff --git a/sbin/ifconfig/ifipsec.c b/sbin/ifconfig/ifipsec.c
--- a/sbin/ifconfig/ifipsec.c
+++ b/sbin/ifconfig/ifipsec.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 2016 Yandex LLC
  * Copyright (c) 2016 Andrey V. Elsukov <ae@FreeBSD.org>
  * All rights reserved.
diff --git a/sbin/ifconfig/ifstf.c b/sbin/ifconfig/ifstf.c
--- a/sbin/ifconfig/ifstf.c
+++ b/sbin/ifconfig/ifstf.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright 2013 Ermal Luci
  * All rights reserved.
  *
diff --git a/sbin/ifconfig/sfp.c b/sbin/ifconfig/sfp.c
--- a/sbin/ifconfig/sfp.c
+++ b/sbin/ifconfig/sfp.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
  * Copyright (c) 2014 Alexander V. Chernikov. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without