diff --git a/target/linux/mvebu/cortexa9/base-files/etc/uci-defaults/03_wireless b/target/linux/mvebu/cortexa9/base-files/etc/uci-defaults/03_wireless
index fcdc8e87786..2039aeaf1bc 100644
--- a/target/linux/mvebu/cortexa9/base-files/etc/uci-defaults/03_wireless
+++ b/target/linux/mvebu/cortexa9/base-files/etc/uci-defaults/03_wireless
@@ -17,7 +17,7 @@ linksys,wrt1900acs|\
 linksys,wrt3200acm|\
 linksys,wrt32x)
 	SKU=$(strings /dev/mtd3|sed -ne 's/^cert_region=//p')
-	WIFIMAC2G=$(macaddr_add $(cat /sys/class/net/eth0/address) +1)
+	WIFIMAC2G=$(macaddr_add $(mtd_get_mac_ascii devinfo hw_mac_addr) +1)
 	WIFIMAC5G=$(macaddr_add $WIFIMAC2G +1)
 	case "$SKU" in
 		AP)