diff --git a/factory_settings.ini b/factory_settings.ini
index 469faac18..b423605ca 100644
--- a/factory_settings.ini
+++ b/factory_settings.ini
@@ -36,7 +36,6 @@ build_flags =
     -D FACTORY_MQTT_PORT=1883
     -D FACTORY_MQTT_USERNAME=\"\"
     -D FACTORY_MQTT_PASSWORD=\"\"
-    -D FACTORY_MQTT_CLIENT_ID=\"ems-esp\"
     -D FACTORY_MQTT_KEEP_ALIVE=60
     -D FACTORY_MQTT_CLEAN_SESSION=false
     -D FACTORY_MQTT_MAX_TOPIC_LENGTH=128