diff --git a/lib/libz/FREEBSD-upgrade b/lib/libz/FREEBSD-upgrade
index d2d251b0cdf1..4ee4eebedb63 100644
--- a/lib/libz/FREEBSD-upgrade
+++ b/lib/libz/FREEBSD-upgrade
@@ -1,4 +1,4 @@
-$FreeBSD: head/lib/libz/FREEBSD-upgrade 146082 2005-05-11 03:50:50Z kientzle $
+$FreeBSD$
 
 ZLib 1.2.2
 
diff --git a/lib/libz/Makefile b/lib/libz/Makefile
index 4ecb022c9a79..0148d2ccb98d 100644
--- a/lib/libz/Makefile
+++ b/lib/libz/Makefile
@@ -1,5 +1,5 @@
 #
-# $FreeBSD: head/lib/libz/Makefile 232263 2012-02-28 18:30:18Z dim $
+# $FreeBSD$
 #
 
 LIB=		z
diff --git a/lib/libz/Symbol.map b/lib/libz/Symbol.map
index b117cdd14778..731ce0ab5ba9 100644
--- a/lib/libz/Symbol.map
+++ b/lib/libz/Symbol.map
@@ -1,5 +1,5 @@
 /*
- * $FreeBSD: head/lib/libz/Symbol.map 206709 2010-04-16 20:07:24Z delphij $
+ * $FreeBSD$
  */
 
 ZLIB_1.2.7.1 {
diff --git a/lib/libz/Versions.def b/lib/libz/Versions.def
index f8e642574d9e..4651e776ab0f 100644
--- a/lib/libz/Versions.def
+++ b/lib/libz/Versions.def
@@ -1,4 +1,4 @@
-# $FreeBSD: head/lib/libz/Versions.def 205486 2010-03-22 22:12:27Z delphij $
+# $FreeBSD$
 
 ZLIB_1.2.4.0 {
 };
diff --git a/lib/libz/zopen.c b/lib/libz/zopen.c
index d570c9864aa2..cde022dcf0e6 100644
--- a/lib/libz/zopen.c
+++ b/lib/libz/zopen.c
@@ -3,7 +3,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: head/lib/libz/zopen.c 84228 2001-09-30 22:39:00Z dillon $");
+__FBSDID("$FreeBSD$");
 
 #include <stdio.h>
 #include <zlib.h>