diff -Nur asterisk-16.6.2-org/res/res_pjsip_messaging.c asterisk-16.6.2/res/res_pjsip_messaging.c --- asterisk-16.6.2-org/res/res_pjsip_messaging.c 2019-11-21 22:14:58.000000000 +0100 +++ asterisk-16.6.2/res/res_pjsip_messaging.c 2020-01-17 03:54:17.467358407 +0100 @@ -745,7 +745,7 @@ return PJ_FALSE; } - code = check_content_type(rdata); + code = check_content_type_in_dialog(rdata); if (code != PJSIP_SC_OK) { send_response(rdata, code, NULL, NULL); return PJ_TRUE;