diff --git a/lib/libc/gen/__getosreldate.c b/lib/libc/gen/__getosreldate.c
index 81fd125b2ee..685382f7697 100644
--- a/lib/libc/gen/__getosreldate.c
+++ b/lib/libc/gen/__getosreldate.c
@@ -2,7 +2,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2007 Peter Wemm
- * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
diff --git a/lib/libc/gen/setproctitle.3 b/lib/libc/gen/setproctitle.3
index a725977e519..15bafa23a98 100644
--- a/lib/libc/gen/setproctitle.3
+++ b/lib/libc/gen/setproctitle.3
@@ -1,23 +1,28 @@
-.\" Copyright (c) 1995 Peter Wemm <peter@FreeBSD.org>
-.\" All rights reserved.
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
+.\" Copyright (c) 1995 Peter Wemm
 .\"
 .\" Redistribution and use in source and binary forms, with or without
-.\" modification, is permitted provided that the following conditions
+.\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
-.\"    notice immediately at the beginning of the file, without modification,
-.\"    this list of conditions, and the following disclaimer.
+.\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
-.\" 3. This work was done expressly for inclusion into FreeBSD.  Other use
-.\"    is permitted provided this notation is included.
-.\" 4. Absolutely no warranty of function or purpose is made by the author
-.\"    Peter Wemm.
-.\" 5. Modifications may be freely made to this file providing the above
-.\"    conditions are met.
 .\"
-.\" $FreeBSD$
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
 .\"
 .\" The following requests are required for all man pages.
 .Dd November 28, 2022
diff --git a/lib/libc/gen/setproctitle.c b/lib/libc/gen/setproctitle.c
index 08612e99d9b..743f27d15b5 100644
--- a/lib/libc/gen/setproctitle.c
+++ b/lib/libc/gen/setproctitle.c
@@ -1,18 +1,28 @@
-/*
- * Copyright (c) 1995 Peter Wemm <peter@freebsd.org>
- * All rights reserved.
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 1995 Peter Wemm
  *
  * Redistribution and use in source and binary forms, with or without
- * modification, is permitted provided that the following conditions
+ * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
- *    notice immediately at the beginning of the file, without modification,
- *    this list of conditions, and the following disclaimer.
+ *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. Absolutely no warranty of function or purpose is made by the author
- *    Peter Wemm.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>