diff --git a/include/net/udp.h b/include/net/udp.h
index 3e55a99..ccce837 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -135,6 +135,7 @@
 
 extern int	udp_sendmsg(struct kiocb *iocb, struct sock *sk,
 			    struct msghdr *msg, size_t len);
+extern void	udp_flush_pending_frames(struct sock *sk);
 
 extern int	udp_rcv(struct sk_buff *skb);
 extern int	udp_ioctl(struct sock *sk, int cmd, unsigned long arg);