diff --git a/package/base-files/files/etc/uci-defaults/11_network-migrate-bridges b/package/base-files/files/etc/uci-defaults/11_network-migrate-bridges
new file mode 100644
index 00000000000..ad13d1a3535
--- /dev/null
+++ b/package/base-files/files/etc/uci-defaults/11_network-migrate-bridges
@@ -0,0 +1,23 @@
+. /lib/functions.sh
+
+migrate_ports() {
+	local config="$1"
+	local type ports ifname
+
+	config_get type "$config" type
+	[ "$type" != "bridge" ] && return
+
+	config_get ports "$config" ports
+	[ -n "$ports" ] && return
+
+	config_get ifname "$config" ifname
+	[ -z "$ifname" ] && return
+
+	for port in $ifname; do
+		uci add_list network.$config.ports="$port"
+	done
+	uci delete network.$config.ifname
+}
+
+config_load network
+config_foreach migrate_ports device