diff --git a/source/_integrations/citybikes.markdown b/source/_integrations/citybikes.markdown
index f22993c6098..f786a5864a6 100644
--- a/source/_integrations/citybikes.markdown
+++ b/source/_integrations/citybikes.markdown
@@ -21,6 +21,7 @@ To enable it, add the following lines to your `configuration.yaml`:
 # Example configuration.yaml entry (using radius)
 sensor:
   - platform: citybikes
+    radius: 200
 ```
 
 {% configuration %}
@@ -44,11 +45,11 @@ longitude:
   default: Defaults to the longitude in your `configuration.yaml` file.
   type: string
 radius:
-  description: The radius (in meters or feet, depending on the Home Assistant configuration) around the monitored location. Only stations closer than this distance will be monitored.
+  description: The radius (in meters or feet, depending on the Home Assistant configuration) around the monitored location. Only stations closer than this distance will be monitored. Either `radius` or `stations` are required.
   required: false
   type: integer
 stations:
-  description: A list of specific stations to monitor. The list should contain station `ID`s or `UID`s, which can be obtained from the CityBikes API.
+  description: A list of specific stations to monitor. The list should contain station `ID`s or `UID`s, which can be obtained from the CityBikes API. Either `radius` or `stations` are required.
   required: false
   type: list
 {% endconfiguration %}