diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 1dba7fd..b948e4e 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2038,7 +2038,8 @@
 		 * the other end.
 		 */
 		if (after(scb->end_seq, tp->snd_una)) {
-			if (tcp_skb_pcount(skb) > 1)
+			if (tcp_skb_pcount(skb) > 1 &&
+			    after(tp->snd_una, scb->seq))
 				acked |= tcp_tso_acked(sk, skb,
 						       now, &seq_rtt);
 			break;