diff --git a/book/routing.rst b/book/routing.rst
index 3abd34f79f0..3a599aa9862 100644
--- a/book/routing.rst
+++ b/book/routing.rst
@@ -833,11 +833,6 @@ that are special: each adds a unique piece of functionality inside your applicat
 
 * ``_locale``: Used to set the locale on the request (:ref:`read more <book-translation-locale-url>`);
 
-.. tip::
-
-    If you use the ``_locale`` parameter in a route, that value will also
-    be stored on the session so that subsequent requests keep this same locale.
-
 .. index::
    single: Routing; Controllers
    single: Controller; String naming format