diff --git a/target/linux/ar71xx/base-files/etc/preinit.arch b/target/linux/ar71xx/base-files/etc/preinit.arch
new file mode 100644
index 0000000000..6e09039059
--- /dev/null
+++ b/target/linux/ar71xx/base-files/etc/preinit.arch
@@ -0,0 +1,24 @@
+#
+# Copyright (C) 2009 OpenWrt.org
+#
+
+. /lib/ar71xx.sh
+
+tew632brp_init_mac_address() {
+	local mtd mac
+
+	mtd=$(grep config /proc/mtd | cut -d: -f1)
+	[ -z $mtd ] && return
+
+	mac=$(grep lan_mac /dev/$mtd | cut -d= -f2)
+	[ ! -z $mac ] && ifconfig eth0 hw ether $mac 2>/dev/null
+
+	mac=$(grep wan_mac /dev/$mtd | cut -d= -f2)
+	[ ! -z $mac ] && ifconfig eth1 hw ether $mac 2>/dev/null
+}
+
+case $(ar71xx_board_name) in
+	tew-632brp)
+		tew632brp_init_mac_address
+		;;
+esac