diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index b4812c3cbbcff574e8c001345b83f69b83ecf7d7..5119856017ab6274257331dcb458f0c65d6d9df0 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1691,11 +1691,16 @@ static inline void tcp_reset_reno_sack(struct tcp_sock *tp)
 int tcp_use_frto(struct sock *sk)
 {
 	const struct tcp_sock *tp = tcp_sk(sk);
+	const struct inet_connection_sock *icsk = inet_csk(sk);
 	struct sk_buff *skb;
 
 	if (!sysctl_tcp_frto)
 		return 0;
 
+	/* MTU probe and F-RTO won't really play nicely along currently */
+	if (icsk->icsk_mtup.probe_size)
+		return 0;
+
 	if (IsSackFrto())
 		return 1;