diff --git a/usr.bin/pr/egetopt.c b/usr.bin/pr/egetopt.c
index 7625bc12d4a5..4c60204c10e0 100644
--- a/usr.bin/pr/egetopt.c
+++ b/usr.bin/pr/egetopt.c
@@ -1,5 +1,5 @@
 /*-
- * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-License-Identifier: BSD-4-Clause
  *
  * Copyright (c) 1991 Keith Muller.
  * Copyright (c) 1993
@@ -16,7 +16,11 @@
  * 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. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
diff --git a/usr.bin/pr/extern.h b/usr.bin/pr/extern.h
index 100f77afcb12..b44eb4187757 100644
--- a/usr.bin/pr/extern.h
+++ b/usr.bin/pr/extern.h
@@ -1,5 +1,5 @@
 /*-
- * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-License-Identifier: BSD-4-Clause
  *
  * Copyright (c) 1991 Keith Muller.
  * Copyright (c) 1993
@@ -16,7 +16,11 @@
  * 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. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
diff --git a/usr.bin/pr/pr.c b/usr.bin/pr/pr.c
index 0f51fab703d5..cc6d290ca4c2 100644
--- a/usr.bin/pr/pr.c
+++ b/usr.bin/pr/pr.c
@@ -1,5 +1,5 @@
 /*-
- * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-License-Identifier: BSD-4-Clause
  *
  * Copyright (c) 1991 Keith Muller.
  * Copyright (c) 1993
@@ -16,7 +16,11 @@
  * 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. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
diff --git a/usr.bin/pr/pr.h b/usr.bin/pr/pr.h
index 8cf9859a7810..2c9e50f6b4fa 100644
--- a/usr.bin/pr/pr.h
+++ b/usr.bin/pr/pr.h
@@ -1,5 +1,5 @@
 /*-
- * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-License-Identifier: BSD-4-Clause
  *
  * Copyright (c) 1991 Keith Muller.
  * Copyright (c) 1993
@@ -16,7 +16,11 @@
  * 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. Neither the name of the University nor the names of its contributors
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *