diff --git a/package/system/procd/files/nand.sh b/package/system/procd/files/nand.sh
index 01dba616444..b5f86e03012 100644
--- a/package/system/procd/files/nand.sh
+++ b/package/system/procd/files/nand.sh
@@ -194,7 +194,7 @@ nand_upgrade_prepare_ubi() {
 
 nand_do_upgrade_success() {
 	local conf_tar="/tmp/sysupgrade.tgz"
-	
+
 	sync
 	[ -f "$conf_tar" ] && nand_restore_config "$conf_tar"
 	echo "sysupgrade successful"
@@ -231,7 +231,7 @@ nand_upgrade_ubifs() {
 	local rootfs_length=`(cat $1 | wc -c) 2> /dev/null`
 
 	nand_upgrade_prepare_ubi "$rootfs_length" "ubifs" "0" "0"
-	
+
 	local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
 	local root_ubivol="$(nand_find_volume $ubidev rootfs)"
 	ubiupdatevol /dev/$root_ubivol -s $rootfs_length $1