diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index aee7196aac36c990eedfc7b494a04351c29bb167..c5c9e2a54218207f0dba9b16920b2e17da84c353 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1273,7 +1273,7 @@ static void __fanout_unlink(struct sock *sk, struct packet_sock *po)
 	spin_unlock(&f->lock);
 }
 
-bool match_fanout_group(struct packet_type *ptype, struct sock * sk)
+static bool match_fanout_group(struct packet_type *ptype, struct sock * sk)
 {
 	if (ptype->af_packet_priv == (void*)((struct packet_sock *)sk)->fanout)
 		return true;