diff --git a/target/linux/mvebu/cortexa9/base-files/lib/upgrade/linksys.sh b/target/linux/mvebu/cortexa9/base-files/lib/upgrade/linksys.sh
index c5da471d76..aaa32eb4ea 100644
--- a/target/linux/mvebu/cortexa9/base-files/lib/upgrade/linksys.sh
+++ b/target/linux/mvebu/cortexa9/base-files/lib/upgrade/linksys.sh
@@ -44,10 +44,6 @@ linksys_get_target_firmware() {
 	esac
 }
 
-linksys_get_root_magic() {
-	(get_image "$@" | dd skip=786432 bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
-}
-
 platform_do_upgrade_linksys() {
 	local magic_long="$(get_magic_long "$1")"
 
@@ -75,20 +71,7 @@ platform_do_upgrade_linksys() {
 		nand_upgrade_tar "$1"
 	}
 	[ "$magic_long" = "27051956" -o "$magic_long" = "0000a0e1" ] && {
-		# check firmwares' rootfs types
-		local target_mtd=$(find_mtd_part $part_label)
-		local oldroot="$(linksys_get_root_magic $target_mtd)"
-		local newroot="$(linksys_get_root_magic "$1")"
-
-		if [ "$newroot" = "55424923" -a "$oldroot" = "55424923" ]
-		# we're upgrading from a firmware with UBI to one with UBI
-		then
-			# erase everything to be safe
-			mtd erase $part_label
-			get_image "$1" | mtd -n write - $part_label
-		else
-			get_image "$1" | mtd write - $part_label
-		fi
+		get_image "$1" | mtd write - $part_label
 	}
 }