diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 159fa3f..725c868 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2306,8 +2306,6 @@ static int tcp_clean_rtx_queue(struct so
 				seq_rtt = -1;
 			} else if (seq_rtt < 0) {
 				seq_rtt = now - scb->when;
-				if (rtt_sample)
-					(*rtt_sample)(sk, tcp_usrtt(skb));
 			}
 			if (sacked & TCPCB_SACKED_ACKED)
 				tp->sacked_out -= tcp_skb_pcount(skb);
@@ -2320,8 +2318,6 @@ static int tcp_clean_rtx_queue(struct so
 			}
 		} else if (seq_rtt < 0) {
 			seq_rtt = now - scb->when;
-			if (rtt_sample)
-				(*rtt_sample)(sk, tcp_usrtt(skb));
 		}
 		tcp_dec_pcount_approx(&tp->fackets_out, skb);
 		tcp_packets_out_dec(tp, skb);
@@ -2333,6 +2329,8 @@ static int tcp_clean_rtx_queue(struct so
 	if (acked&FLAG_ACKED) {
 		tcp_ack_update_rtt(sk, acked, seq_rtt);
 		tcp_ack_packets_out(sk, tp);
+		if (rtt_sample && !(acked & FLAG_RETRANS_DATA_ACKED))
+			(*rtt_sample)(sk, tcp_usrtt(skb));
 
 		if (icsk->icsk_ca_ops->pkts_acked)
 			icsk->icsk_ca_ops->pkts_acked(sk, pkts_acked);