diff --git a/source/components/sensor.swiss_public_transport.markdown b/source/components/sensor.swiss_public_transport.markdown
index c24cdd5a752..838c3df7a60 100644
--- a/source/components/sensor.swiss_public_transport.markdown
+++ b/source/components/sensor.swiss_public_transport.markdown
@@ -24,7 +24,11 @@ sensor:
   platform: swiss_public_transport
   from: STATION_ID
   to: STATION_ID
-
 ```
 
+Configuration variables:
+
+- **from** (*Required*): The ID of the station of the start station.
+- **to** (*Required*): The ID of the station of the end station.
+
 The public timetables are coming from [Swiss public transport](http://transport.opendata.ch).