diff --git a/source/_integrations/template.markdown b/source/_integrations/template.markdown
index 2e2be5425f1..de19f2645c3 100644
--- a/source/_integrations/template.markdown
+++ b/source/_integrations/template.markdown
@@ -382,7 +382,7 @@ binary_sensor:
       type: device_class
       default: None
     state:
-      description: The sensor is `on` if the template evaluates as `True`, `yes`, `on`, `enable` or a positive number. Any other value will render it as `off`. The actual appearance in the frontend (`Open`/`Closed`, `Detected`/`Clear` etc) depends on the sensor's device_class value
+      description: The sensor is `on` if the template evaluates as `True`, `yes`, `on`, `enable` or a positive number. The sensor is `unknown` if the template evaluates as `None`. Any other value will render it as `off`. The actual appearance in the frontend (`Open`/`Closed`, `Detected`/`Clear` etc) depends on the sensor's device_class value
       required: true
       type: template