diff --git a/manifests/objectexpirer.pp b/manifests/objectexpirer.pp
index 1ef83abe..75727480 100644
--- a/manifests/objectexpirer.pp
+++ b/manifests/objectexpirer.pp
@@ -101,12 +101,6 @@
 #    (optional) Log level
 #    Defaults to 'LOG_LOCAL2'.
 #
-# DEPRECATED PARAMETERS
-#
-#  [*auto_create_account_prefix*]
-#    (optional) Prefix to use when automatically creating accounts.
-#    Defaults to undef
-#
 class swift::objectexpirer(
   $manage_service                = true,
   $enabled                       = true,
@@ -128,17 +122,11 @@ class swift::objectexpirer(
   $cache_tls_keyfile             = undef,
   $log_level                     = 'INFO',
   $log_facility                  = 'LOG_LOCAL2',
-  # DEPRECATED PARAMETERS
-  $auto_create_account_prefix    = undef,
 ) inherits swift::params {
 
   include swift::deps
   Swift_object_expirer_config<||> ~> Service['swift-object-expirer']
 
-  if $auto_create_account_prefix != undef {
-    warning('The auto_create_account_prefix parameter is deprecated. Use the swift::constraints class.')
-  }
-
   # On Red Hat platforms, it may be defined already,
   # because it is part of openstack-swift-proxy
   if $::swift::params::object_expirer_package_name != $::swift::params::proxy_package_name {
@@ -180,7 +168,6 @@ class swift::objectexpirer(
 
   swift_object_expirer_config {
     'pipeline:main/pipeline':                       value => join($pipeline, ' ');
-    'object-expirer/auto_create_account_prefix':    value => pick($auto_create_account_prefix, $facts['os_service_default']);
     'object-expirer/concurrency':                   value => $concurrency;
     'object-expirer/expiring_objects_account_name': value => $expiring_objects_account_name;
     'object-expirer/interval':                      value => $interval;
diff --git a/releasenotes/notes/remove-object-expirer-auto_create_account_prefix-f7c7dbc3a764791b.yaml b/releasenotes/notes/remove-object-expirer-auto_create_account_prefix-f7c7dbc3a764791b.yaml
new file mode 100644
index 00000000..8dcca15d
--- /dev/null
+++ b/releasenotes/notes/remove-object-expirer-auto_create_account_prefix-f7c7dbc3a764791b.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The ``swift::objectexpirer::auto_create_account_prefix`` parameter has
+    been removed.
diff --git a/spec/classes/swift_objectexpirer_spec.rb b/spec/classes/swift_objectexpirer_spec.rb
index 892567b2..80838330 100644
--- a/spec/classes/swift_objectexpirer_spec.rb
+++ b/spec/classes/swift_objectexpirer_spec.rb
@@ -7,7 +7,6 @@ describe 'swift::objectexpirer' do
       :enabled                       => true,
       :package_ensure                => 'present',
       :pipeline                      => ['catch_errors', 'proxy-logging', 'cache', 'proxy-server'],
-      :auto_create_account_prefix    => '<SERVICE DEFAULT>',
       :concurrency                   => '<SERVICE DEFAULT>',
       :expiring_objects_account_name => '<SERVICE DEFAULT>',
       :interval                      => '<SERVICE DEFAULT>',
@@ -38,8 +37,6 @@ describe 'swift::objectexpirer' do
       it 'configures object-expirer.conf' do
         is_expected.to contain_swift_object_expirer_config(
           'pipeline:main/pipeline').with_value(p[:pipeline].join(' '))
-        is_expected.to contain_swift_object_expirer_config(
-          'object-expirer/auto_create_account_prefix').with_value(p[:auto_create_account_prefix])
         is_expected.to contain_swift_object_expirer_config(
           'object-expirer/concurrency').with_value(p[:concurrency])
         is_expected.to contain_swift_object_expirer_config(