diff --git a/iup/files/etc/init.d/iup b/iup/files/etc/init.d/iup
index 436045e8f..e6e42d3a8 100755
--- a/iup/files/etc/init.d/iup
+++ b/iup/files/etc/init.d/iup
@@ -54,7 +54,7 @@ init_iup() {
 		esac
 	done
 	if [ $proto == "dhcp" ]; then
-		newreqopts="$(echo $newreqopts | sed "s/^[ \t]*//")"
+		newreqopts="$(echo $newreqopts | tr ' ' '\n' | sort -n | tr '\n' ' ' | sed 's/^[ \t]*//;s/[ \t]*$//')"
 		uci -q set network.wan.reqopts="$newreqopts"
 		uci commit network
 		ubus call network reload