Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 351501)
+++ channels/chan_sip.c	(working copy)
@@ -9043,7 +9043,7 @@
 				else if (video) {
 					if (process_sdp_a_sendonly(value, &vsendonly))
 						processed = TRUE;
-					else if (process_crypto(p, p->vrtp, &p->vsrtp, value))
+					else if (p->vrtp && process_crypto(p, p->vrtp, &p->vsrtp, value))
 						processed = TRUE;
 					else if (process_sdp_a_video(value, p, &newvideortp, &last_rtpmap_codec))
 						processed = TRUE;
@@ -9052,7 +9052,7 @@
 				else if (text) {
 					if (process_sdp_a_text(value, p, &newtextrtp, red_fmtp, &red_num_gen, red_data_pt, &last_rtpmap_codec))
 						processed = TRUE;
-					else if (process_crypto(p, p->trtp, &p->tsrtp, value))
+					else if (p->trtp && process_crypto(p, p->trtp, &p->tsrtp, value))
 						processed = TRUE;
 				}
 				/* Image (T.38 FAX) specific scanning */