diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 164fa9dcd97..c3ae2411650 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -756,7 +756,8 @@ static int pppol2tp_connect(struct socket *sock, struct sockaddr *uservaddr,
 	/* If PMTU discovery was enabled, use the MTU that was discovered */
 	dst = sk_dst_get(tunnel->sock);
 	if (dst != NULL) {
-		u32 pmtu = dst_mtu(__sk_dst_get(tunnel->sock));
+		u32 pmtu = dst_mtu(dst);
+
 		if (pmtu != 0)
 			session->mtu = session->mru = pmtu -
 				PPPOL2TP_HEADER_OVERHEAD;