diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 8b15df6b2d56..9557b5f291e7 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1877,7 +1877,7 @@ static int process_sip_msg(struct sk_buff *skb, struct nf_conn *ct,
 }
 
 static void sip_tcp_skip_process(int ret, struct nf_conn *ct, struct sk_buff *skb,
-				 unsigned int protoff, s16 tdiff)
+				 unsigned int protoff, s16 *tdiff)
 {
 	if (ret == NF_ACCEPT && ct && ct->status & IPS_NAT_MASK) {
 		const struct nf_nat_sip_hooks *hooks;