diff --git a/target/linux/ipq806x/base-files/etc/board.d/02_network b/target/linux/ipq806x/base-files/etc/board.d/02_network
index a70440600..ea7b88b4b 100644
--- a/target/linux/ipq806x/base-files/etc/board.d/02_network
+++ b/target/linux/ipq806x/base-files/etc/board.d/02_network
@@ -73,7 +73,7 @@ tplink,c2600)
 norton,core-518)
 	hw_mac_addr=$(mtd_get_mac_ascii_mmc 0:APPSBLENV ethaddr)
 	ucidef_add_switch "switch0" \
-		"2:lan" "3:lan" "4:lan" "6@eth1" "5:wan" "0@eth0"
+		"2:lan" "3:lan" "4:lan" "6u@eth1" "5:wan" "0u@eth0"
 	ucidef_set_interface_macaddr "wan" "$hw_mac_addr"
 	ucidef_set_interface_macaddr "lan" "$(macaddr_add $hw_mac_addr 1)"
 	;;