diff --git a/doc/source/install/include/configure-ironic-api.inc b/doc/source/install/include/configure-ironic-api.inc
index 085d11c70c..f289c75d28 100644
--- a/doc/source/install/include/configure-ironic-api.inc
+++ b/doc/source/install/include/configure-ironic-api.inc
@@ -72,9 +72,10 @@ Configuring ironic-api service
 
 #. Configure the ironic-api service to use these credentials with the Identity
    service. Replace ``PUBLIC_IDENTITY_IP`` with the public IP of the Identity
-   server, ``PRIVATE_IDENTITY_IP`` with the private IP of the Identity server
-   and replace ``IRONIC_PASSWORD`` with the password you chose for the
-   ``ironic`` user in the Identity service:
+   server, ``PRIVATE_IDENTITY_IP`` with the private IP of the Identity server,
+   replace ``IRONIC_PASSWORD`` with the password you chose for the
+   ``ironic`` user in the Identity service and replace ``MEMCACHED_SERVER``
+   with the hostname of the memcached server:
 
    .. code-block:: ini
 
@@ -112,6 +113,9 @@ Configuring ironic-api service
       # User's domain name (string value)
       user_domain_name=Default
 
+      # memcached setting (string value)
+      memcached_servers=MEMCACHED_SERVER:11211
+
 #. Create the Bare Metal service database tables:
 
    .. code-block:: bash