diff --git a/environments/undercloud.yaml b/environments/undercloud.yaml
index 4c2ce6049f..7672d46dcb 100644
--- a/environments/undercloud.yaml
+++ b/environments/undercloud.yaml
@@ -211,6 +211,7 @@ parameter_defaults:
     ironic::api::authtoken::memcached_servers: "%{hiera('memcached::listen_ip_uri')}:11211"
     ironic::inspector::authtoken::memcached_servers: "%{hiera('memcached::listen_ip_uri')}:11211"
     keystone::cache_memcache_servers: "%{hiera('memcached::listen_ip_uri')}:11211"
+    keystone::cache_backend: "dogpile.cache.memcached"
     manila::keystone::authtoken::memcached_servers: "%{hiera('memcached::listen_ip_uri')}:11211"
     manila::keystone::authtoken::memcached_servers: "%{hiera('memcached::listen_ip_uri')}:11211"
     mistral::keystone::authtoken::memcached_servers: "%{hiera('memcached::listen_ip_uri')}:11211"