diff --git a/package/base-files/files/lib/network/config.sh b/package/base-files/files/lib/network/config.sh
index 22828f83bb..a5bc9ac6f2 100755
--- a/package/base-files/files/lib/network/config.sh
+++ b/package/base-files/files/lib/network/config.sh
@@ -325,12 +325,12 @@ setup_interface() {
 
 	# Interface settings
 	grep "$iface:" /proc/net/dev > /dev/null && {
-		local mtu macaddr
+		local mtu macaddr txqueuelen
 		config_get mtu "$config" mtu
 		config_get macaddr "$config" macaddr
 		config_get txqueuelen "$config" txqueuelen
 		[ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
-		$DEBUG ifconfig "$iface_main" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} ${txqueuelen:+txqueuelen $txqueuelen} up
+		$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} ${txqueuelen:+txqueuelen $txqueuelen} up
 	}
 	set_interface_ifname "$config" "$iface"