diff --git a/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network b/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
index fa861c5989..01c7ab8e30 100755
--- a/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt76x8/base-files/etc/board.d/02_network
@@ -184,9 +184,9 @@ ramips_setup_macs()
 		label_mac=$wan_mac
 		;;
 	buffalo,wcr-1166ds)
-		local index="$(find_mtd_index "board_data")"
-		wan_mac="$(grep -m1 mac= "/dev/mtd${index}" | cut -d= -f2)"
+		wan_mac=$(mtd_get_mac_ascii board_data "mac")
 		lan_mac=$wan_mac
+		label_mac=$wan_mac
 		;;
 	cudy,wr1000|\
 	hilink,hlk-7628n|\