diff --git a/newip/third_party/linux-5.10/include/net/tcp_nip.h b/newip/third_party/linux-5.10/include/net/tcp_nip.h
index 1e30efd..feece7a 100644
--- a/newip/third_party/linux-5.10/include/net/tcp_nip.h
+++ b/newip/third_party/linux-5.10/include/net/tcp_nip.h
@@ -163,6 +163,12 @@ static inline struct tcp_nip_request_sock *tcp_nip_rsk(const struct request_sock
 	return (struct tcp_nip_request_sock *)req;
 }
 
+static inline void tcp_nip_modify_send_head(struct sock *sk, const struct sk_buff *skb)
+{
+	if (tcp_skb_is_last(sk, skb))
+		sk->sk_send_head = NULL;
+}
+
 /* connect */
 int __tcp_nip_connect(struct sock *sk);
 int _tcp_nip_conn_request(struct request_sock_ops *rsk_ops,
diff --git a/newip/third_party/linux-5.10/net/newip/tcp_nip.c b/newip/third_party/linux-5.10/net/newip/tcp_nip.c
index 39a2c7f..0d1a771 100644
--- a/newip/third_party/linux-5.10/net/newip/tcp_nip.c
+++ b/newip/third_party/linux-5.10/net/newip/tcp_nip.c
@@ -1578,6 +1578,7 @@ out:
 
 do_fault:
 	if (!skb->len) {
+		tcp_nip_modify_send_head(sk, skb);
 		tcp_unlink_write_queue(skb, sk);
 		sk_wmem_free_skb(sk, skb);
 	}
diff --git a/newip/third_party/linux-5.10/net/newip/tcp_nip_input.c b/newip/third_party/linux-5.10/net/newip/tcp_nip_input.c
index 7c2eabf..0fedaf2 100644
--- a/newip/third_party/linux-5.10/net/newip/tcp_nip_input.c
+++ b/newip/third_party/linux-5.10/net/newip/tcp_nip_input.c
@@ -817,6 +817,7 @@ static int tcp_nip_clean_rtx_queue(struct sock *sk, ktime_t *skb_snd_tstamp)
 		if (*skb_snd_tstamp == 0)
 			*skb_snd_tstamp = skb->tstamp;
 
+		tcp_nip_modify_send_head(sk, skb);
 		tcp_unlink_write_queue(skb, sk);
 		sk_wmem_free_skb(sk, skb);
 	}