diff --git a/docs/ref/settings.txt b/docs/ref/settings.txt
index f7705949fd..5c96960b85 100644
--- a/docs/ref/settings.txt
+++ b/docs/ref/settings.txt
@@ -873,6 +873,9 @@ SESSION_ENGINE
 
 .. versionadded:: 1.0
 
+.. versionchanged:: 1.1
+   The ``cache_db`` backend was added
+
 Default: ``django.contrib.sessions.backends.db``
 
 Controls where Django stores session data. Valid values are:
@@ -880,6 +883,7 @@ Controls where Django stores session data. Valid values are:
     * ``'django.contrib.sessions.backends.db'``
     * ``'django.contrib.sessions.backends.file'``
     * ``'django.contrib.sessions.backends.cache'``
+    * ``'django.contrib.sessions.backends.cache_db'``
 
 See :ref:`topics-http-sessions`.
 
diff --git a/docs/topics/http/sessions.txt b/docs/topics/http/sessions.txt
index 3b1429b440..75fe49208c 100644
--- a/docs/topics/http/sessions.txt
+++ b/docs/topics/http/sessions.txt
@@ -410,6 +410,9 @@ SESSION_ENGINE
 
 .. versionadded:: 1.0
 
+.. versionchanged:: 1.1
+   The ``cache_db`` backend was added
+
 Default: ``django.contrib.sessions.backends.db``
 
 Controls where Django stores session data. Valid values are:
@@ -417,6 +420,7 @@ Controls where Django stores session data. Valid values are:
     * ``'django.contrib.sessions.backends.db'``
     * ``'django.contrib.sessions.backends.file'``
     * ``'django.contrib.sessions.backends.cache'``
+    * ``'django.contrib.sessions.backends.cache_db'``
 
 See `configuring the session engine`_ for more details.