diff --git a/target/linux/mvebu/base-files/lib/preinit/06_set_iface_mac b/target/linux/mvebu/base-files/lib/preinit/06_set_iface_mac
index 7217e93370..9fc8d9a0ce 100644
--- a/target/linux/mvebu/base-files/lib/preinit/06_set_iface_mac
+++ b/target/linux/mvebu/base-files/lib/preinit/06_set_iface_mac
@@ -11,9 +11,8 @@ preinit_set_mac_address() {
 	case $(mvebu_board_name) in
 	armada-xp-linksys-mamba)
 		mac=$(mtd_get_mac_ascii devinfo hw_mac_addr)
-		mac_wan=$(macaddr_setbit_la "$mac")
 		ifconfig eth0 hw ether $mac 2>/dev/null
-		ifconfig eth1 hw ether $mac_wan 2>/dev/null
+		ifconfig eth1 hw ether $mac 2>/dev/null
 		;;
 	armada-385-linksys-caiman|armada-385-linksys-cobra)
 		mac=$(mtd_get_mac_ascii devinfo hw_mac_addr)