whoops missed one!

systemctl_mqtt/__init__.py

@@ -390,7 +390,7 @@ async def _dbus_signal_loop_unit(  # pylint: disable=too-many-arguments
         unit_name=unit_name
     )
     ((_, last_active_state),) = await unit_proxy.Get(property_name="ActiveState")
-    await mqtt_client.publish(topic=active_state_topic, payload=last_active_state)
+    await mqtt_client.publish(topic=active_state_topic, payload=last_active_state, retain=True)
     with dbus_router.filter(unit_properties_changed_match_rule) as queue:
         while True:
             await queue.get()