diff --git a/manifests/keystone/authtoken.pp b/manifests/keystone/authtoken.pp
index 73dc2d9c..1e844976 100644
--- a/manifests/keystone/authtoken.pp
+++ b/manifests/keystone/authtoken.pp
@@ -146,6 +146,11 @@
 #   advanced pool will only work under python 2.x Boolean value
 #   Defaults to $::os_service_default.
 #
+# [*memcached_ipv6*]
+#   (Optional) Set to true if memcached is listening on IPv6 family protocol
+#   and hostnames are used for memcached servers.
+#   Defaults to false
+#
 # [*memcached_servers*]
 #   (Optional) Optionally specify a list of memcached server(s) to use for
 #   caching. If left undefined, tokens will instead be cached in-process.
@@ -225,6 +230,7 @@ class aodh::keystone::authtoken(
   $memcache_secret_key            = $::os_service_default,
   $memcache_security_strategy     = $::os_service_default,
   $memcache_use_advanced_pool     = $::os_service_default,
+  $memcached_ipv6                 = false,
   $memcached_servers              = $::os_service_default,
   $manage_memcache_package        = false,
   $region_name                    = $::os_service_default,
@@ -275,6 +281,7 @@ class aodh::keystone::authtoken(
       memcache_security_strategy     => $memcache_security_strategy,
       memcache_use_advanced_pool     => $memcache_use_advanced_pool,
       memcache_pool_unused_timeout   => $memcache_pool_unused_timeout,
+      memcached_ipv6                 => $memcached_ipv6,
       memcached_servers              => $memcached_servers,
       manage_memcache_package        => $manage_memcache_package,
       region_name                    => $region_name,
diff --git a/releasenotes/notes/bug-1964824-memcached-inet6-prefix-for-hostnames-03aedcdb4c9e74e6.yaml b/releasenotes/notes/bug-1964824-memcached-inet6-prefix-for-hostnames-03aedcdb4c9e74e6.yaml
new file mode 100644
index 00000000..a87d8f63
--- /dev/null
+++ b/releasenotes/notes/bug-1964824-memcached-inet6-prefix-for-hostnames-03aedcdb4c9e74e6.yaml
@@ -0,0 +1,10 @@
+---
+fixes:
+  - |
+    Add param ``$memcached_ipv6`` in *keystone/authtoken.pp*. When set to
+    ``true`` (default is: ``false``) the keystone::resource::authtoken will
+    use the inet6_prefix_any function to set the ``inet6:`` prefix for all
+    memcached servers. This is useful for services relying on python-memcached
+    which require this format: ``inet6:[<hostname>]:<port>``. Bug: `1964824
+    <https://bugs.launchpad.net/tripleo/+bug/1964824>`_.
+