diff --git a/lib/libz/Makefile b/lib/libz/Makefile
index 09af96fdf37..7cce380a0a8 100644
--- a/lib/libz/Makefile
+++ b/lib/libz/Makefile
@@ -1,5 +1,5 @@
 #
-# $FreeBSD$
+# $Id$
 #
 
 MAINTAINER=peter@FreeBSD.org