diff --git a/lib/libc/gen/fmtcheck.3 b/lib/libc/gen/fmtcheck.3
index 782526d52134..ecd70fb8b309 100644
--- a/lib/libc/gen/fmtcheck.3
+++ b/lib/libc/gen/fmtcheck.3
@@ -11,13 +11,6 @@
 .\" 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 NetBSD
-.\"        Foundation, Inc. and its contributors.
-.\" 4. Neither the name of The NetBSD Foundation nor the names of its
-.\"    contributors may be used to endorse or promote products derived
-.\"    from this software without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
diff --git a/lib/libc/gen/stringlist.3 b/lib/libc/gen/stringlist.3
index 30dd299a7a44..44d2a36ffa4a 100644
--- a/lib/libc/gen/stringlist.3
+++ b/lib/libc/gen/stringlist.3
@@ -13,13 +13,6 @@
 .\" 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 NetBSD
-.\"        Foundation, Inc. and its contributors.
-.\" 4. Neither the name of The NetBSD Foundation nor the names of its
-.\"    contributors may be used to endorse or promote products derived
-.\"    from this software without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
diff --git a/lib/libc/include/reentrant.h b/lib/libc/include/reentrant.h
index 8ab328bc6279..22a2325d821c 100644
--- a/lib/libc/include/reentrant.h
+++ b/lib/libc/include/reentrant.h
@@ -13,13 +13,6 @@
  * 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 NetBSD
- *        Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- *    contributors may be used to endorse or promote products derived
- *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
diff --git a/lib/libc/sys/mlockall.2 b/lib/libc/sys/mlockall.2
index db4c4a933e4c..d09ce27b644d 100644
--- a/lib/libc/sys/mlockall.2
+++ b/lib/libc/sys/mlockall.2
@@ -15,13 +15,6 @@
 .\" 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 NetBSD
-.\"        Foundation, Inc. and its contributors.
-.\" 4. Neither the name of The NetBSD Foundation nor the names of its
-.\"    contributors may be used to endorse or promote products derived
-.\"    from this software without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
diff --git a/lib/libc/sys/ntp_adjtime.2 b/lib/libc/sys/ntp_adjtime.2
index 5f5185f4976c..65ff8a3f0dfe 100644
--- a/lib/libc/sys/ntp_adjtime.2
+++ b/lib/libc/sys/ntp_adjtime.2
@@ -14,13 +14,6 @@
 .\" 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 NetBSD
-.\"        Foundation, Inc. and its contributors.
-.\" 4. Neither the name of The NetBSD Foundation nor the names of its
-.\"    contributors may be used to endorse or promote products derived
-.\"    from this software without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
diff --git a/lib/libc/sys/utrace.2 b/lib/libc/sys/utrace.2
index a83c18551ad0..517728880cbb 100644
--- a/lib/libc/sys/utrace.2
+++ b/lib/libc/sys/utrace.2
@@ -14,13 +14,6 @@
 .\" 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 NetBSD
-.\"      Foundation, Inc. and its contributors.
-.\" 4. Neither the name of The NetBSD Foundation nor the names of its
-.\"    contributors may be used to endorse or promote products derived
-.\"    from this software without specific prior written permission.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES