diff --git a/demo/mqtt_async/mqtt_async.c b/demo/mqtt_async/mqtt_async.c
index 48de04783..dc0236b00 100644
--- a/demo/mqtt_async/mqtt_async.c
+++ b/demo/mqtt_async/mqtt_async.c
@@ -294,15 +294,11 @@ init_dialer_tls(nng_dialer d, const char *cacert, const char *cert,
 	}
 
 	if (cert != NULL && key != NULL) {
-		nng_tls_config_auth_mode(cfg, NNG_TLS_AUTH_MODE_REQUIRED);
 		if ((rv = nng_tls_config_own_cert(cfg, cert, key, pass)) !=
 		    0) {
 			goto out;
 		}
-	} else {
-		nng_tls_config_auth_mode(cfg, NNG_TLS_AUTH_MODE_NONE);
 	}
-
 	if (cacert != NULL) {
 		if ((rv = nng_tls_config_ca_chain(cfg, cacert, NULL)) != 0) {
 			goto out;