diff --git a/source/_components/light.mqtt.markdown b/source/_components/light.mqtt.markdown
index 3b423e62eaf..ee03a6fb35e 100644
--- a/source/_components/light.mqtt.markdown
+++ b/source/_components/light.mqtt.markdown
@@ -45,6 +45,7 @@ Configuration variables:
 - **payload_off** (*Optional*): The payload that represents disabled state. Default is "OFF".
 - **payload_on** (*Optional*): The payload that represents enabled state. Default is "ON".
 - **qos** (*Optional*): The maximum QoS level of the state topic. Default is 0 and will also be used to publishing messages.
+- **retain** (*Optional*): If the published message should have the retain flag on or not.
 - **rgb_command_topic** (*Optional*): The MQTT topic to publish commands to change the light's RGB state.
 - **rgb_state_topic** (*Optional*): The MQTT topic subscribed to receive RGB state updates.
 - **rgb_value_template** (*Optional*): Defines a [template](/topics/templating/) to extract the RGB value.