diff --git a/sbin/Makefile b/sbin/Makefile
index 86300fccada8..8505895a6239 100644
--- a/sbin/Makefile
+++ b/sbin/Makefile
@@ -1,12 +1,13 @@
 #	@(#)Makefile	8.5 (Berkeley) 3/31/94
 
 # XXX MISSING:		icheck ncheck
+# XXX BROKEN:		mount_union
 
 SUBDIR= adjkerntz badsect ccdconfig clri disklabel dmesg dset dump dumpfs \
 	dumplfs dumpon fsck fsdb ifconfig init ipfw md5 mknod modload \
 	modunload mount mount_cd9660 mount_ext2fs \
 	mount_lfs mount_nfs mount_null mount_portal mount_std \
-	mount_umap mount_union mountd newfs newlfs nfsd nfsiod \
+	mount_umap mountd newfs newlfs nfsd nfsiod \
 	nologin ping quotacheck rdisc reboot restore route savecore scsi \
 	scsiformat shutdown slattach startslip swapon tunefs umount