diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index c1113a1cfe..d6bb077e1c 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -12232,6 +12232,22 @@ static enum check_auth_result check_peer_ok(struct sip_pvt *p, char *of,
 		if (!peer) {
 			peer = find_peer(NULL, &p->recv, TRUE, FINDPEERS, FALSE);
 		}
+
+		/* If the peer is still not found, try the address and port from the
+		 * contact header.  If the transport type is TCP or TLS it is not possible
+		 * to find the peer using p->recv. Because of the way TCP works, the received
+		 * packet's destination port will not match the one the peer table is
+		 * built with. */
+		if (!peer && (p->socket.type != SIP_TRANSPORT_UDP)) {
+			struct sockaddr_in tmpsin;
+			char contact[SIPBUFSIZE];
+			char *tmp;
+			memcpy(&tmpsin, &p->recv, sizeof(tmpsin));
+			ast_copy_string(contact, get_header(req, "Contact"), sizeof(contact));
+			tmp = get_in_brackets(contact);
+			__set_address_from_contact(tmp, &tmpsin, 1);
+			peer = find_peer(NULL, &tmpsin, TRUE, FINDPEERS, FALSE);
+		}
 	}
 
 	if (!peer) {