diff --git a/target/linux/ramips/base-files/lib/preinit/06_set_iface_mac b/target/linux/ramips/base-files/lib/preinit/06_set_iface_mac
index 9fef7d471a..2d6a4b6dee 100644
--- a/target/linux/ramips/base-files/lib/preinit/06_set_iface_mac
+++ b/target/linux/ramips/base-files/lib/preinit/06_set_iface_mac
@@ -13,6 +13,10 @@ preinit_set_mac_address() {
 		mac=$(maccalc or "$mac" "02:00:00:00:00:00")
 		ifconfig eth0 hw ether $mac 2>/dev/null
 		;;
+	hw550-3g)
+		mac=$(ramips_get_mac_binary factory 40)
+		ifconfig eth0 hw ether $mac 2>/dev/null
+		;;
 	esac
 }