diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 34f91987ca..ef29068d19 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -8250,11 +8250,11 @@ retryowner2:
 	iax_frame_wrap(fr, &f);
 
 	/* If this is our most recent packet, use it as our basis for timestamping */
-	if (iaxs[fr->callno]->last < fr->ts) {
+	if (iaxs[fr->callno] && iaxs[fr->callno]->last < fr->ts) {
 		/*iaxs[fr->callno]->last = fr->ts; (do it afterwards cos schedule/forward_delivery needs the last ts too)*/
 		fr->outoforder = 0;
 	} else {
-		if (option_debug && iaxdebug)
+		if (option_debug && iaxdebug && iaxs[fr->callno])
 			ast_log(LOG_DEBUG, "Received out of order packet... (type=%d, subclass %d, ts = %d, last = %d)\n", f.frametype, f.subclass, fr->ts, iaxs[fr->callno]->last);
 		fr->outoforder = -1;
 	}