diff --git a/package/base-files/files/lib/upgrade/stage2 b/package/base-files/files/lib/upgrade/stage2
index bdc12c7426..9d55f3b340 100755
--- a/package/base-files/files/lib/upgrade/stage2
+++ b/package/base-files/files/lib/upgrade/stage2
@@ -50,7 +50,7 @@ switch_to_ramfs() {
 		md5sum hexdump cat zcat bzcat dd tar			\
 		ls basename find cp mv rm mkdir rmdir mknod touch chmod \
 		'[' printf wc grep awk sed cut				\
-		mtd partx losetup mkfs.ext4				\
+		mtd partx losetup mkfs.ext4 nandwrite flash_erase	\
 		ubiupdatevol ubiattach ubiblock ubiformat		\
 		ubidetach ubirsvol ubirmvol ubimkvol			\
 		snapshot snapshot_tool					\