diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 7aaa8c91b2938f4ac2872ed2002ccf97d2806390..1b5c6c1055f75edb03e1b5c42d1777e5ac311b81 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -442,6 +442,9 @@ static int sip_help(struct sk_buff **pskb,
 
 	/* RTP info only in some SDP pkts */
 	if (memcmp(dptr, "INVITE", sizeof("INVITE") - 1) != 0 &&
+	    memcmp(dptr, "UPDATE", sizeof("UPDATE") - 1) != 0 &&
+	    memcmp(dptr, "SIP/2.0 180", sizeof("SIP/2.0 180") - 1) != 0 &&
+	    memcmp(dptr, "SIP/2.0 183", sizeof("SIP/2.0 183") - 1) != 0 &&
 	    memcmp(dptr, "SIP/2.0 200", sizeof("SIP/2.0 200") - 1) != 0) {
 		goto out;
 	}