diff --git a/things.ino b/things.ino
index ccbac2b..23d88d1 100644
--- a/things.ino
+++ b/things.ino
@@ -154,7 +154,7 @@ void mqtt_reconnect() {
     if (mqtt_client.connect(wifi_station_get_hostname(), topic("online"), MQTTQOS1, true, "0")) {
       Serial.println("connected");
       // once connected, publish an announcement...
-      mqtt_client.publish(topic("online"), "1");
+      mqtt_client.publish(topic("online"), "1", true);
       // ... and resubscribe:
       mqtt_client.subscribe("inTopic");
     } else {