diff --git a/en/controllers/components/cookie.rst b/en/controllers/components/cookie.rst
index 7906e1639f..1827f47549 100644
--- a/en/controllers/components/cookie.rst
+++ b/en/controllers/components/cookie.rst
@@ -7,6 +7,8 @@ Cookie
 
 The CookieComponent is a wrapper around the native PHP ``setcookie()`` method. It
 makes it easier to manipulate cookies, and automatically encrypt cookie data.
+Cookies added through CookieComponent will only be sent if the controller action
+completes.
 
 .. deprecated:: 3.5.0
     You should use :ref:`encrypted-cookie-middleware` instead of