diff --git a/components/sensor/index.rst b/components/sensor/index.rst
index 64c454d34..6e382ebcf 100644
--- a/components/sensor/index.rst
+++ b/components/sensor/index.rst
@@ -400,6 +400,9 @@ Configuration variables:
 
 - **alpha** (*Optional*, float): The forget factor/alpha value of the filter. Defaults to ``0.1``.
 - **send_every** (*Optional*, int): How often a sensor value should be pushed out. Defaults to ``15``.
+- **send_first_at** (*Optional*, int): By default, the very first raw value on boot is immediately
+  published. With this parameter you can specify when the very first value is to be sent.
+  Defaults to ``1``.
 
 ``throttle``
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