diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6a6a88d..b1aa324 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -371,8 +371,8 @@
 extern int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
 extern int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 				 const struct tcphdr *th, unsigned int len);
-extern int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
-			       const struct tcphdr *th, unsigned int len);
+extern void tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
+				const struct tcphdr *th, unsigned int len);
 extern void tcp_rcv_space_adjust(struct sock *sk);
 extern void tcp_cleanup_rbuf(struct sock *sk, int copied);
 extern int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp);