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 aba8da239e..fd41836c8d 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
@@ -21,8 +21,8 @@ preinit_set_mac_address() {
 
 		mac=$(mtd_get_mac_ascii devinfo hw_mac_addr)
 		mac_wan=$(macaddr_setbit_la "$mac")
-		ip link set dev eth1 address $mac 2>/dev/null
-		ip link set dev eth0 address $mac_wan 2>/dev/null
+		ip link set dev eth0 address $mac 2>/dev/null
+		ip link set dev eth1 address $mac_wan 2>/dev/null
 		;;
 	linksys,mamba)
 		mac=$(mtd_get_mac_ascii devinfo hw_mac_addr)