diff --git a/package/network/ipv6/6in4/files/6in4.sh b/package/network/ipv6/6in4/files/6in4.sh
index 5b5c7b36af9..99b2b763124 100755
--- a/package/network/ipv6/6in4/files/6in4.sh
+++ b/package/network/ipv6/6in4/files/6in4.sh
@@ -45,10 +45,12 @@ proto_6in4_setup() {
 	local iface="$2"
 	local link="6in4-$cfg"
 
-	local mtu ttl tos ipaddr peeraddr ip6addr ip6prefix ip6prefixes tunlink tunnelid username password updatekey
-	json_get_vars mtu ttl tos ipaddr peeraddr ip6addr tunlink tunnelid username password updatekey
+	local mtu ttl tos ipaddr peeraddr ip6addr ip6prefix ip6prefixes tunlink tunnelid username password updatekey device
+	json_get_vars mtu ttl tos ipaddr peeraddr ip6addr tunlink tunnelid username password updatekey device
 	json_for_each_item proto_6in4_add_prefix ip6prefix ip6prefixes
 
+	[ -n "$device" ] && link="$device"
+
 	[ -z "$peeraddr" ] && {
 		proto_notify_error "$cfg" "MISSING_ADDRESS"
 		proto_block_restart "$cfg"
@@ -156,6 +158,7 @@ proto_6in4_init_config() {
 	proto_config_add_int "mtu"
 	proto_config_add_int "ttl"
 	proto_config_add_string "tos"
+	proto_config_add_string "device"
 }
 
 [ -n "$INCLUDE_ONLY" ] || {