diff --git a/package/base-files/default/sbin/mount_root b/package/base-files/default/sbin/mount_root
index c393e06f3..e855b41a1 100755
--- a/package/base-files/default/sbin/mount_root
+++ b/package/base-files/default/sbin/mount_root
@@ -22,6 +22,7 @@ if [ "$1" != "failsafe" ]; then
 		if [ -z "$(nvram get no_root_swap)" ]; then
 			is_clean || {
 				mtd erase OpenWrt
+				mtd unlock linux
 				jffs2root --clean
 			}
 			mtd unlock OpenWrt