diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index a7b3ec9b6c3e..20dfd892c86f 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -940,7 +940,7 @@ void __init tcp_tasklet_init(void)
  * We cant xmit new skbs from this context, as we might already
  * hold qdisc lock.
  */
-void tcp_wfree(struct sk_buff *skb)
+static void tcp_wfree(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
 	struct tcp_sock *tp = tcp_sk(sk);