diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1ca2536..b68cdfb 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1482,6 +1482,9 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
 					break;
 			}
 			used = recv_actor(desc, skb, offset, len);
+			/* Clean up data we have read: This will do ACK frames. */
+			if (used > 0)
+				tcp_cleanup_rbuf(sk, used);
 			if (used < 0) {
 				if (!copied)
 					copied = used;