diff --git a/newlib/libc/sys/rtems/include/sys/_bitset.h b/newlib/libc/sys/rtems/include/sys/_bitset.h
index 8d8a4c220..df8dcab19 100644
--- a/newlib/libc/sys/rtems/include/sys/_bitset.h
+++ b/newlib/libc/sys/rtems/include/sys/_bitset.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
  * All rights reserved.
  *
diff --git a/newlib/libc/sys/rtems/include/sys/_cpuset.h b/newlib/libc/sys/rtems/include/sys/_cpuset.h
index dc4e61f9b..15936d997 100644
--- a/newlib/libc/sys/rtems/include/sys/_cpuset.h
+++ b/newlib/libc/sys/rtems/include/sys/_cpuset.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2008,	Jeffrey Roberson <jeff@freebsd.org>
  * All rights reserved.
  *
diff --git a/newlib/libc/sys/rtems/include/sys/bitset.h b/newlib/libc/sys/rtems/include/sys/bitset.h
index 931daf900..2c55b600a 100644
--- a/newlib/libc/sys/rtems/include/sys/bitset.h
+++ b/newlib/libc/sys/rtems/include/sys/bitset.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
  * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
  * All rights reserved.
  *