diff --git a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
index 0b1e57af31..38dbedbd4d 100755
--- a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
@@ -73,22 +73,51 @@ platform_check_image() {
 		platform_check_image_all0258n "$1" && return 0
 		return 1
 		;;
-	ap121 | ap121-mini | ap96 | db120 | zcn-1523h-2 | zcn-1523h-5)
+	ap121 | \
+	ap121-mini | \
+	ap96 | \
+	db120 | \
+	zcn-1523h-2 | \
+	zcn-1523h-5)
 		[ "$magic_long" != "68737173" -a "$magic_long" != "19852003" ] && {
 			echo "Invalid image type."
 			return 1
 		}
 		return 0
 		;;
-	ap81 | ap83 | dir-600-a1 | dir-615-c1 | dir-825-b1 | mzk-w04nu | mzk-w300nh | tew-632brp | wrt400n | bullet-m | nanostation-m | rocket-m | wzr-hp-g300nh | wzr-hp-ag300h | whr-hp-g300n | nbg460n_550n_550nh | unifi )
+	ap81 | \
+	ap83 | \
+	dir-600-a1 | \
+	dir-615-c1 | \
+	dir-825-b1 | \
+	mzk-w04nu | \
+	mzk-w300nh | \
+	tew-632brp | \
+	wrt400n | \
+	bullet-m | \
+	nanostation-m | \
+	rocket-m | \
+	wzr-hp-g300nh | \
+	wzr-hp-ag300h | \
+	whr-hp-g300n | \
+	nbg460n_550n_550nh | \
+	unifi )
 		[ "$magic" != "2705" ] && {
 			echo "Invalid image type."
 			return 1
 		}
 		return 0
 		;;
-	tl-mr3220 | tl-mr3420 | tl-wa901nd | tl-wa901nd-v2 | tl-wr703n | tl-wr741nd | tl-wr741nd-v4 | \
-	tl-wr841n-v1 | tl-wr941nd | tl-wr1043nd)
+	tl-mr3220 | \
+	tl-mr3420 | \
+	tl-wa901nd | \
+	tl-wa901nd-v2 | \
+	tl-wr703n | \
+	tl-wr741nd | \
+	tl-wr741nd-v4 | \
+	tl-wr841n-v1 | \
+	tl-wr941nd | \
+	tl-wr1043nd)
 		[ "$magic" != "0100" ] && {
 			echo "Invalid image type."
 			return 1
@@ -116,7 +145,13 @@ platform_check_image() {
 		}
 		return 0
 		;;
-	routerstation | routerstation-pro | ls-sr71 | pb42 | pb44 | eap7660d | ja76pf )
+	routerstation | \
+	routerstation-pro | \
+	ls-sr71 | \
+	pb42 | \
+	pb44 | \
+	eap7660d | \
+	ja76pf )
 		[ "$magic" != "4349" ] && {
 			echo "Invalid image. Use *-sysupgrade.bin files on this board"
 			return 1
@@ -143,7 +178,11 @@ platform_do_upgrade() {
 	local board=$(ar71xx_board_name)
 
 	case "$board" in
-	routerstation | routerstation-pro | ls-sr71 | eap7660d | ja76pf )
+	routerstation | \
+	routerstation-pro | \
+	ls-sr71 | \
+	eap7660d | \
+	ja76pf)
 		platform_do_upgrade_combined "$ARGV"
 		;;
 	all0258n )