diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e2bec81..bb32668 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5983,6 +5983,7 @@
 				 * need req so release it.
 				 */
 				if (req) {
+					tcp_synack_rtt_meas(sk, req);
 					reqsk_fastopen_remove(sk, req, false);
 				} else {
 					/* Make sure socket is routed, for
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 1e66f7f..0a7e020 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -868,6 +868,8 @@
 					    ireq->rmt_addr,
 					    ireq->opt);
 		err = net_xmit_eval(err);
+		if (!tcp_rsk(req)->snt_synack && !err)
+			tcp_rsk(req)->snt_synack = tcp_time_stamp;
 	}
 
 	return err;
@@ -1382,6 +1384,7 @@
 	struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
 	const struct inet_request_sock *ireq = inet_rsk(req);
 	struct sock *child;
+	int err;
 
 	req->retrans = 0;
 	req->sk = NULL;
@@ -1393,8 +1396,11 @@
 		kfree_skb(skb_synack);
 		return -1;
 	}
-	ip_build_and_send_pkt(skb_synack, sk, ireq->loc_addr,
-			ireq->rmt_addr, ireq->opt);
+	err = ip_build_and_send_pkt(skb_synack, sk, ireq->loc_addr,
+				    ireq->rmt_addr, ireq->opt);
+	err = net_xmit_eval(err);
+	if (!err)
+		tcp_rsk(req)->snt_synack = tcp_time_stamp;
 	/* XXX (TFO) - is it ok to ignore error and continue? */
 
 	spin_lock(&queue->fastopenq->lock);
@@ -1612,7 +1618,6 @@
 		isn = tcp_v4_init_sequence(skb);
 	}
 	tcp_rsk(req)->snt_isn = isn;
-	tcp_rsk(req)->snt_synack = tcp_time_stamp;
 
 	if (dst == NULL) {
 		dst = inet_csk_route_req(sk, &fl4, req);
@@ -1650,6 +1655,7 @@
 		if (err || want_cookie)
 			goto drop_and_free;
 
+		tcp_rsk(req)->snt_synack = tcp_time_stamp;
 		tcp_rsk(req)->listener = NULL;
 		/* Add the request_sock to the SYN table */
 		inet_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index cfeeeb7..d6212d6b 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1169,7 +1169,6 @@
 	}
 have_isn:
 	tcp_rsk(req)->snt_isn = isn;
-	tcp_rsk(req)->snt_synack = tcp_time_stamp;
 
 	if (security_inet_conn_request(sk, skb, req))
 		goto drop_and_release;
@@ -1180,6 +1179,7 @@
 	    want_cookie)
 		goto drop_and_free;
 
+	tcp_rsk(req)->snt_synack = tcp_time_stamp;
 	tcp_rsk(req)->listener = NULL;
 	inet6_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
 	return 0;