diff --git a/target/linux/mediatek/filogic/base-files/etc/board.d/02_network b/target/linux/mediatek/filogic/base-files/etc/board.d/02_network
index d532d75b99e..40d1b504e34 100644
--- a/target/linux/mediatek/filogic/base-files/etc/board.d/02_network
+++ b/target/linux/mediatek/filogic/base-files/etc/board.d/02_network
@@ -79,7 +79,7 @@ mediatek_setup_interfaces()
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4 lan6" "eth1 wan"
 		;;
 	mediatek,mt7986b-rfb)
-		ucidef_set_interfaces_lan_wan "lan0 lan1 lan2 lan3" eth1
+		ucidef_set_interfaces_lan_wan "lan0 lan1 lan2 lan3 lan4" eth1
 		;;
 	mediatek,mt7988a-rfb)
 		ucidef_set_interfaces_lan_wan "lan0 lan1 lan2 lan3 eth2" eth1