diff --git a/include/net/tcp.h b/include/net/tcp.h
index c00e7d51bb18d77f47ef9fb016ef432f5db4f7be..7717302cab91e1bb18cc42c3f2d4b51f98f3c148 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1523,6 +1523,8 @@ static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unli
 {
 	if (sk->sk_send_head == skb_unlinked)
 		sk->sk_send_head = NULL;
+	if (tcp_sk(sk)->highest_sack == skb_unlinked)
+		tcp_sk(sk)->highest_sack = NULL;
 }
 
 static inline void tcp_init_send_head(struct sock *sk)