diff --git a/include/net/tcp.h b/include/net/tcp.h
index 970f4a70e03cfc614169633aa3b86ad9468a5227..d633f98b40f90f424908bd38b6a845cb6594628e 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1878,7 +1878,7 @@ void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
 static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
 {
 	struct net *net = sock_net((struct sock *)tp);
-	return tp->notsent_lowat ?: net->ipv4.sysctl_tcp_notsent_lowat;
+	return tp->notsent_lowat ?: READ_ONCE(net->ipv4.sysctl_tcp_notsent_lowat);
 }
 
 static inline bool tcp_stream_memory_free(const struct sock *sk)