diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index fff3f3e7bf4b0b0d5d63bb7beaa65a514d9f6f0c..9ddd3ff6bd80dc3836b1df1db9703ff6c8e66027 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2330,7 +2330,7 @@ static inline void tcp_mtu_check_reprobe(struct sock *sk)
 	u32 interval;
 	s32 delta;
 
-	interval = net->ipv4.sysctl_tcp_probe_interval;
+	interval = READ_ONCE(net->ipv4.sysctl_tcp_probe_interval);
 	delta = tcp_jiffies32 - icsk->icsk_mtup.probe_timestamp;
 	if (unlikely(delta >= interval * HZ)) {
 		int mss = tcp_current_mss(sk);