diff --git a/net/netfilter/nf_conntrack_h323_main.c 
b/net/netfilter/nf_conntrack_h323_main.c
index 46d69d7..7f0de36 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -270,9 +270,8 @@ static int expect_rtp_rtcp(struct sk_buff *skb, 
struct nf_conn *ct,
                 return 0;

         /* RTP port is even */
-       port &= htons(~1);
-       rtp_port = port;
-       rtcp_port = htons(ntohs(port) + 1);
+       rtp_port = port & htons(~1);
+       rtcp_port = htons(ntohs(rtp_port) + 1);

         /* Create expect for RTP */