diff --git a/sys/dev/extres/syscon/syscon.c b/sys/dev/extres/syscon/syscon.c
index 8c2d7664952..c728f8435c1 100644
--- a/sys/dev/extres/syscon/syscon.c
+++ b/sys/dev/extres/syscon/syscon.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2017 Kyle Evans <kevans@FreeBSD.org>
  * All rights reserved.
  *
diff --git a/sys/dev/extres/syscon/syscon.h b/sys/dev/extres/syscon/syscon.h
index 7825dfd844a..5ae801df243 100644
--- a/sys/dev/extres/syscon/syscon.h
+++ b/sys/dev/extres/syscon/syscon.h
@@ -1,5 +1,7 @@
 /*-
- * Copyright 2017 Kyle Evans <kevans@FreeBSD.org>
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2017 Kyle Evans <kevans@FreeBSD.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/sys/dev/extres/syscon/syscon_generic.c b/sys/dev/extres/syscon/syscon_generic.c
index cf019020169..8b18bd19709 100644
--- a/sys/dev/extres/syscon/syscon_generic.c
+++ b/sys/dev/extres/syscon/syscon_generic.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2015 Michal Meloun
  * All rights reserved.
  *
diff --git a/sys/dev/extres/syscon/syscon_generic.h b/sys/dev/extres/syscon/syscon_generic.h
index b36bf5b06da..56d78d69130 100644
--- a/sys/dev/extres/syscon/syscon_generic.h
+++ b/sys/dev/extres/syscon/syscon_generic.h
@@ -1,5 +1,7 @@
 /*-
- * Copyright 2018 Kyle Evans <kevans@FreeBSD.org>
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without