diff --git a/distrib/cdrom/Makefile b/distrib/cdrom/Makefile
index 5e775b5de6f6..e45629322736 100644
--- a/distrib/cdrom/Makefile
+++ b/distrib/cdrom/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.55 2024/05/31 20:54:33 tsutsui Exp $
+# $NetBSD: Makefile,v 1.56 2024/05/31 20:57:32 tsutsui Exp $
 #
 # Consult "*.conf" for the configuration variables; this Makefile is typically
 # not edited for basic configuration changes.
@@ -298,12 +298,12 @@ MKISOFS_ARGS.${image}+= -b ${BOOTFILE.amd64} -c boot.catalog
 .if !empty(ports:Mmacppc)
 BOOTHFS=	boothfs
 MKISOFS_ARGS.${image}+=	-hfs -part -hide-hfs-list ${.CURDIR}/hide-hfs.lst \
-	--macbin -data-change-warn -map ${.CURDIR}/hfsmap.lst \
+	--macbin -map ${.CURDIR}/hfsmap.lst \
 	-boot-hfs-file ${.OBJDIR}/${BOOTHFS}
 UUDECODE_FILES=	${BOOTHFS}
 .include <bsd.files.mk>
 .elif defined(USE_APPLE_ISO) || !empty(ports:Mmac68k)
-MKISOFS_ARGS.${image}+=	-apple --macbin -data-change-warn -map ${.CURDIR}/hfsmap.lst
+MKISOFS_ARGS.${image}+=	-apple --macbin -map ${.CURDIR}/hfsmap.lst
 .endif
 
 # Sun (sparc, sparc64, sun3)
diff --git a/etc/etc.mac68k/Makefile.inc b/etc/etc.mac68k/Makefile.inc
index 8d42efbffe25..4452381de61f 100644
--- a/etc/etc.mac68k/Makefile.inc
+++ b/etc/etc.mac68k/Makefile.inc
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.24 2023/05/19 14:47:16 hauke Exp $
+#	$NetBSD: Makefile.inc,v 1.25 2024/05/31 20:57:32 tsutsui Exp $
 #
 #	etc.mac68k/Makefile.inc -- mac68k-specific etc Makefile targets
 #
@@ -18,7 +18,7 @@ snap_md_post:
 
 # For "make iso-image"
 # mkisofs arguments to create a hybrid (HFS/Rockridge) CD-ROM image.
-MKISOFS_FLAGS+=	-hfs --macbin -data-change-warn \
+MKISOFS_FLAGS+=	-hfs --macbin \
 	-map ${RELEASEDIR}/${RELEASEMACHINEDIR}/installation/misc/extensions.map
 
 iso-image: do-iso-image