diff --git a/src/mqttdpms.rs b/src/mqttdpms.rs
index c4615ba..30620ae 100644
--- a/src/mqttdpms.rs
+++ b/src/mqttdpms.rs
@@ -170,7 +170,7 @@ impl MqttDpms {
             .topics
             .availability
             .replace("@UNIQUEID@", &self.config.unique_id);
-        let message = mqtt::Message::new(topic, "online", 0);
+        let message = mqtt::Message::new_retained(topic, "online", 0);
         Ok(client.publish(message).await?)
     }