diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index dc19ba1..7eb76fb 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -448,7 +448,7 @@
 /*
  * Push out all pending data as one UDP datagram. Socket is locked.
  */
-int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
+static int udp_push_pending_frames(struct sock *sk, struct udp_sock *up)
 {
 	struct inet_sock *inet = inet_sk(sk);
 	struct flowi *fl = &inet->cork.fl;