diff --git a/package/base-files/files/lib/preinit/80_mount_root b/package/base-files/files/lib/preinit/80_mount_root
index f1b0afeb03..20bb8b52dd 100755
--- a/package/base-files/files/lib/preinit/80_mount_root
+++ b/package/base-files/files/lib/preinit/80_mount_root
@@ -4,10 +4,11 @@
 do_mount_root() {
 	mount_root
 	boot_run_hook preinit_mount_root
-	[ -f /sysupgrade.tgz ] && {
+	[ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && {
 		echo "- config restore -"
 		cd /
-		tar xzf /sysupgrade.tgz
+		[ -f /sysupgrade.tgz ] && tar xzf /sysupgrade.tgz
+		[ -f /tmp/sysupgrade.tar ] && tar xf /tmp/sysupgrade.tar
 		# Prevent configuration corruption on a power loss
 		sync
 	}