--- chan_sip.orig	2005-09-09 09:45:19.000000000 -0400
+++ chan_sip.c	2005-09-09 09:18:45.000000000 -0400
@@ -9184,7 +9184,7 @@
 			transmit_response(p, "100 Trying", req);
 		}
 	} else {
-		if (p && !ast_test_flag(p, SIP_NEEDDESTROY)) {
+		if (p && !ast_test_flag(p, SIP_NEEDDESTROY) && !ignore) {
 			if (!p->jointcapability) {
 				if (ignore)
 					transmit_response(p, "488 Not Acceptable Here (codec error)", req);