diff --git a/newlib/libc/sys/rtems/include/arpa/inet.h b/newlib/libc/sys/rtems/include/arpa/inet.h
index 91e3a828a..14cd24e36 100644
--- a/newlib/libc/sys/rtems/include/arpa/inet.h
+++ b/newlib/libc/sys/rtems/include/arpa/inet.h
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * ++Copyright++ 1983, 1993
  * -
  * Copyright (c) 1983, 1993
diff --git a/newlib/libc/sys/rtems/include/netdb.h b/newlib/libc/sys/rtems/include/netdb.h
index ff7a7ab63..0e64a9c02 100644
--- a/newlib/libc/sys/rtems/include/netdb.h
+++ b/newlib/libc/sys/rtems/include/netdb.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1980, 1983, 1988, 1993
  *	The Regents of the University of California.  All rights reserved.
  *
diff --git a/newlib/libc/sys/rtems/include/termios.h b/newlib/libc/sys/rtems/include/termios.h
index 0e8918e3e..5ada6cd31 100644
--- a/newlib/libc/sys/rtems/include/termios.h
+++ b/newlib/libc/sys/rtems/include/termios.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1988, 1989, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
  *