Index: sbin/mount/mount.c
===================================================================
--- sbin/mount/mount.c
+++ sbin/mount/mount.c
@@ -345,6 +345,7 @@
 				else
 					failok = 0;
 				if (!(init_flags & MNT_UPDATE) &&
+				    !hasopt(fs->fs_mntops, "update") &&
 				    ismounted(fs, mntbuf, mntsize))
 					continue;
 				options = update_options(options, fs->fs_mntops,