--- zzzz-none-000/linux-3.10.107/net/l2tp/Kconfig	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/l2tp/Kconfig	2021-02-04 17:41:59.000000000 +0000
@@ -6,6 +6,7 @@
 	tristate "Layer Two Tunneling Protocol (L2TP)"
 	depends on (IPV6 || IPV6=n)
 	depends on INET
+	select NET_UDP_TUNNEL
 	---help---
 	  Layer Two Tunneling Protocol