diff --git a/lib/libz/Makefile b/lib/libz/Makefile
index 4c78c6e9046..afebefa4576 100644
--- a/lib/libz/Makefile
+++ b/lib/libz/Makefile
@@ -1,5 +1,5 @@
 #
-# $Id: Makefile,v 1.1 1996/08/18 17:59:48 peter Exp $
+# $Id: Makefile,v 1.2 1996/08/18 23:52:20 peter Exp $
 #
 
 MAINTAINER=peter@FreeBSD.org
@@ -17,8 +17,10 @@ SRCS = adler32.c compress.c crc32.c gzio.c uncompr.c deflate.c trees.c \
        zutil.c inflate.c infblock.c inftrees.c infcodes.c infutil.c inffast.c
 
 beforeinstall:
-	${INSTALL} -c -m 644 -o ${BINOWN} -g ${BINGRP} ${.CURDIR}/zlib.h \
-		${.CURDIR}/zconf.h ${DESTDIR}/usr/include
+.for hdr in zconf.h zlib.h
+	${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 ${.CURDIR}/${hdr} \
+		${DESTDIR}/usr/include
+.endfor
 
 minigzip:	all minigzip.o
 	$(CC) -o minigzip minigzip.o -L. -lz
@@ -31,5 +33,4 @@ test: example minigzip
 	(export LD_LIBRARY_PATH=. ; \
 		echo hello world | ./minigzip | ./minigzip -d )
 
-
 .include <bsd.lib.mk>