diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index a97ed5416c28ee14ecab0ac4483c079a0c3e4c1d..e9a54ae7d6903845598db14a8e1cba54026faf1b 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -456,7 +456,8 @@ void tcp_rcv_space_adjust(struct sock *sk)
 
 		tp->rcvq_space.space = space;
 
-		if (sysctl_tcp_moderate_rcvbuf) {
+		if (sysctl_tcp_moderate_rcvbuf &&
+		    !(sk->sk_userlocks & SOCK_RCVBUF_LOCK)) {
 			int new_clamp = space;
 
 			/* Receive space grows, normalize in order to