Index: b/channels/chan_sip.c
===================================================================
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -19451,7 +19451,8 @@ static int handle_incoming(struct sip_pv
 			 */
 			req->ignore = 1;
 			append_history(p, "Ignore", "Ignoring this retransmit\n");
-		} else if (e) {
+		}
+		if (!ret && e) {
 			e = ast_skip_blanks(e);
 			if (sscanf(e, "%d %n", &respid, &len) != 1) {
 				ast_log(LOG_WARNING, "Invalid response: '%s'\n", e);