diff --git a/doc/source/overview_auth.rst b/doc/source/overview_auth.rst
index ee0f3fb85d..a042593642 100644
--- a/doc/source/overview_auth.rst
+++ b/doc/source/overview_auth.rst
@@ -96,6 +96,7 @@ add the configuration for the authtoken middleware::
   admin_tenant_name = service
   admin_user = swift
   admin_password = password
+  cache = swift.cache
 
 The actual values for these variables will need to be set depending on
 your situation.  For more information, please refer to the Keystone
diff --git a/etc/proxy-server.conf-sample b/etc/proxy-server.conf-sample
index 164ddf1071..b8de3f06da 100644
--- a/etc/proxy-server.conf-sample
+++ b/etc/proxy-server.conf-sample
@@ -160,6 +160,7 @@ user_test_tester3 = testing3
 # admin_user = swift
 # admin_password = password
 # delay_auth_decision = 1
+# cache = swift.cache
 #
 # [filter:keystoneauth]
 # use = egg:swift#keystoneauth