diff --git a/target/linux/mediatek/mt7623/base-files/lib/preinit/07_set_iface_mac b/target/linux/mediatek/mt7623/base-files/lib/preinit/07_set_iface_mac
index 60b699d9c9..7b165df565 100644
--- a/target/linux/mediatek/mt7623/base-files/lib/preinit/07_set_iface_mac
+++ b/target/linux/mediatek/mt7623/base-files/lib/preinit/07_set_iface_mac
@@ -42,16 +42,22 @@ preinit_set_mac_address() {
 	local rootpart
 
 	case $(board_name) in
-	bananapi,bpi-r2)
+	bananapi,bpi-r2|\
+	unielec,u7623-02-emmc-512m)
 		rootpart=$(cat /proc/cmdline)
 		rootpart="${rootpart##*root=}"
-		rootpart="${rootpart%%p3 *}"
-		if [ "$rootpart" = "/dev/mmcblk0" -o "$rootpart" = "/dev/mmcblk1" ]; then
-			set_recovery_mac_address ${rootpart}p2
-		fi
-		;;
-	unielec,u7623-02-emmc-512m)
-		set_recovery_mac_address /dev/mmcblk0p1
+		rootpart="${rootpart%% *}"
+		case $rootpart in
+		/dev/mmcblk0p2) # Legacy U7623 image
+			set_recovery_mac_address /dev/mmcblk0p1
+			;;
+		/dev/mmcblk0p3) # U7623 or Banana Pi R2 eMMC
+			set_recovery_mac_address /dev/mmcblk0p2
+			;;
+		/dev/mmcblk1p3) # Banana Pi R2 SD
+			set_recovery_mac_address /dev/mmcblk1p2
+			;;
+		esac
 		;;
 	esac
 }