diff --git a/source/_components/sensor.gtfs.markdown b/source/_components/sensor.gtfs.markdown
index 094a26ce1af..00243470ada 100644
--- a/source/_components/sensor.gtfs.markdown
+++ b/source/_components/sensor.gtfs.markdown
@@ -54,4 +54,5 @@ Configuration variables:
 - **destination** (*Required*): The stop ID of your destination station.
 - **data** (*Required*): The name of the ZIP file or folder containing the GTFS data. It must be located inside the `gtfs` folder of your configuration directory.
 - **name** (*Optional*): Name to use in the frontend.
+- **offset** (*Optional*): A minimum delay to look for. If a departure is in less time than `offset`, it will be ignored. Defaults to `0`.