Index: sbin/mount/mount.c
===================================================================
--- sbin/mount/mount.c
+++ sbin/mount/mount.c
@@ -487,8 +487,9 @@
 
 	for (i = mntsize - 1; i >= 0; --i)
 		if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
+		    strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 
 		    (!isremountable(fs->fs_vfstype) ||
-		     strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
+		     (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)))
 			return (1);
 	return (0);
 }