diff --git a/net/tcp/tcp_send.c b/net/tcp/tcp_send.c
index 9e6dd4e523ed5..02e289ee56374 100644
--- a/net/tcp/tcp_send.c
+++ b/net/tcp/tcp_send.c
@@ -382,7 +382,6 @@ void tcp_send(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
 void tcp_reset(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn)
 {
   FAR struct tcp_hdr_s *tcp;
-  uint32_t ackno;
   uint16_t tmp16;
   uint16_t acklen = 0;
   uint8_t seqbyte;
@@ -437,7 +436,6 @@ void tcp_reset(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn)
 
   acklen        -= (tcp->tcpoffset >> 4) << 2;
 
-  tcp->flags     = TCP_RST | TCP_ACK;
   tcp->tcpoffset = 5 << 4;
 
   /* Flip the seqno and ackno fields in the TCP header. */
@@ -463,9 +461,19 @@ void tcp_reset(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn)
    * to propagate the carry to the other bytes as well.
    */
 
-  ackno = tcp_addsequence(tcp->ackno, acklen);
-
-  tcp_setsequence(tcp->ackno, ackno);
+  if ((tcp->flags & TCP_ACK) != 0)
+    {
+      tcp->flags = TCP_RST;
+      tcp_setsequence(tcp->ackno, 0);
+    }
+  else
+    {
+      uint32_t ackno;
+      tcp->flags = TCP_RST | TCP_ACK;
+      tcp_setsequence(tcp->seqno, 0);
+      ackno = tcp_addsequence(tcp->ackno, acklen);
+      tcp_setsequence(tcp->ackno, ackno);
+    }
 
   /* Swap port numbers. */