diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 883aaeebba..fd6edc73d9 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -12311,6 +12311,15 @@ static void handle_response(struct sip_pvt *p, int resp, char *rest, struct sip_
 				handle_response_refer(p, resp, rest, req, seqno);
 			else if (p->registry && sipmethod == SIP_REGISTER)
 				res = handle_response_register(p, resp, rest, req, ignore, seqno);
+			else if (sipmethod == SIP_BYE)
+				if (ast_strlen_zero(p->authname))
+					ast_log(LOG_WARNING, "Asked to authenticate %s, to %s:%d but we have no matching peer!\n",
+							msg, ast_inet_ntoa(p->recv.sin_addr), ntohs(p->recv.sin_port));
+					ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);	
+				if ((p->authtries == MAX_AUTHTRIES) || do_proxy_auth(p, req, "WWW-Authenticate", "Authorization", sipmethod, 0)) {
+					ast_log(LOG_NOTICE, "Failed to authenticate on %s to '%s'\n", msg, get_header(&p->initreq, "From"));
+					ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);	
+				}
 			else {
 				ast_log(LOG_WARNING, "Got authentication request (401) on unknown %s to '%s'\n", sip_methods[sipmethod].text, get_header(req, "To"));
 				ast_set_flag(&p->flags[0], SIP_NEEDDESTROY);