diff --git a/lib/libc/gen/fts-compat.h b/lib/libc/gen/fts-compat.h
index dfdd53bfb65c..d8fe6895f11c 100644
--- a/lib/libc/gen/fts-compat.h
+++ b/lib/libc/gen/fts-compat.h
@@ -10,11 +10,7 @@
  * 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. 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
+ * 3. 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/lib/libc/net/name6.c b/lib/libc/net/name6.c
index f36016249602..118e033e128d 100644
--- a/lib/libc/net/name6.c
+++ b/lib/libc/net/name6.c
@@ -42,11 +42,7 @@
  * 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. 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
+ * 3. 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/lib/libc/sys/sctp_generic_recvmsg.2 b/lib/libc/sys/sctp_generic_recvmsg.2
index d6fd1b564de2..8ee3d36f90e9 100644
--- a/lib/libc/sys/sctp_generic_recvmsg.2
+++ b/lib/libc/sys/sctp_generic_recvmsg.2
@@ -9,11 +9,7 @@
 .\" 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. 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
+.\" 3. 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/lib/libc/sys/sctp_generic_sendmsg.2 b/lib/libc/sys/sctp_generic_sendmsg.2
index 1a2b12866d97..bf54e95473d5 100644
--- a/lib/libc/sys/sctp_generic_sendmsg.2
+++ b/lib/libc/sys/sctp_generic_sendmsg.2
@@ -9,11 +9,7 @@
 .\" 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. 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
+.\" 3. 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/lib/libc/sys/sctp_peeloff.2 b/lib/libc/sys/sctp_peeloff.2
index 40a026d8139d..9964586c9e9e 100644
--- a/lib/libc/sys/sctp_peeloff.2
+++ b/lib/libc/sys/sctp_peeloff.2
@@ -9,11 +9,7 @@
 .\" 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. 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
+.\" 3. 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.
 .\"