diff --git a/components/sensor/index.rst b/components/sensor/index.rst
index 418e4d113..9be1a5869 100644
--- a/components/sensor/index.rst
+++ b/components/sensor/index.rst
@@ -603,7 +603,7 @@ To prevent values from being published, return ``{}``:
 .. code-block:: yaml
 
     filters:
-      - lambda: !lambda |-
+      - lambda: |-
           if (x < 10) return {};
           return x-10;