diff --git a/net/tcp/tcp_input.c b/net/tcp/tcp_input.c
index f51c17a4cf..0c65a515f4 100644
--- a/net/tcp/tcp_input.c
+++ b/net/tcp/tcp_input.c
@@ -773,6 +773,7 @@ found:
                     tcp_getsequence(conn->sndseq), ackseq, unackseq,
                     (uint32_t)conn->tx_unacked);
               tcp_setsequence(conn->sndseq, ackseq);
+              conn->nrtx = 0;
             }
         }
 #endif