diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 6cb424564d..dfec3953d6 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -12994,8 +12994,11 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 		get_rdnis(p, NULL);			/* Get redirect information */
 		extract_uri(p, req);			/* Get the Contact URI */
 		build_contact(p);			/* Build our contact header */
-		ast_rtp_setdtmf(p->rtp, ast_test_flag(&p->flags[0], SIP_DTMF) != SIP_DTMF_INFO);
-		ast_rtp_setdtmfcompensate(p->rtp, ast_test_flag(&p->flags[1], SIP_PAGE2_RFC2833_COMPENSATE));
+
+		if (p->rtp) {
+			ast_rtp_setdtmf(p->rtp, ast_test_flag(&p->flags[0], SIP_DTMF) != SIP_DTMF_INFO);
+			ast_rtp_setdtmfcompensate(p->rtp, ast_test_flag(&p->flags[1], SIP_PAGE2_RFC2833_COMPENSATE));
+		}
 
 		if (!replace_id && gotdest) {	/* No matching extension found */
 			if (gotdest == 1 && ast_test_flag(&p->flags[1], SIP_PAGE2_ALLOWOVERLAP)) {