diff --git a/manifests/keystone/authtoken.pp b/manifests/keystone/authtoken.pp
index 8ab03071..a085dc5d 100644
--- a/manifests/keystone/authtoken.pp
+++ b/manifests/keystone/authtoken.pp
@@ -177,6 +177,11 @@
 #   true/false
 #   Defaults to $::os_service_default.
 #
+# [*interface*]
+#  (Optional) Interface to use for the Identity API endpoint. Valid values are
+#  "public", "internal" or "admin".
+#  Defaults to $::os_service_default.
+#
 class barbican::keystone::authtoken(
   $password                       = $::os_service_default,
   $username                       = 'barbican',
@@ -212,6 +217,7 @@ class barbican::keystone::authtoken(
   $token_cache_time               = $::os_service_default,
   $service_token_roles            = $::os_service_default,
   $service_token_roles_required   = $::os_service_default,
+  $interface                      = $::os_service_default,
 ) {
 
   include ::barbican::deps
@@ -255,5 +261,6 @@ class barbican::keystone::authtoken(
     token_cache_time               => $token_cache_time,
     service_token_roles            => $service_token_roles,
     service_token_roles_required   => $service_token_roles_required,
+    interface                      => $interface,
   }
 }
diff --git a/releasenotes/notes/keystone-authtoken-interface-afb76e9845f1b739.yaml b/releasenotes/notes/keystone-authtoken-interface-afb76e9845f1b739.yaml
new file mode 100644
index 00000000..38055483
--- /dev/null
+++ b/releasenotes/notes/keystone-authtoken-interface-afb76e9845f1b739.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The new ``barbican::keystone::authtoken::interface`` parameter has been
+    added, which can be used to set the interface parameter in authtoken
+    middleware.
diff --git a/spec/classes/barbican_keystone_authtoken_spec.rb b/spec/classes/barbican_keystone_authtoken_spec.rb
index 660cb595..26186a68 100644
--- a/spec/classes/barbican_keystone_authtoken_spec.rb
+++ b/spec/classes/barbican_keystone_authtoken_spec.rb
@@ -63,6 +63,7 @@ describe 'barbican::keystone::authtoken' do
         is_expected.to contain_barbican_config('keystone_authtoken/token_cache_time').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_barbican_config('keystone_authtoken/service_token_roles').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_barbican_config('keystone_authtoken/service_token_roles_required').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_barbican_config('keystone_authtoken/interface').with_value('<SERVICE DEFAULT>')
       end
     end
 
@@ -103,6 +104,7 @@ describe 'barbican::keystone::authtoken' do
           :token_cache_time                     => '301',
           :service_token_roles                  => ['service'],
           :service_token_roles_required         => false,
+          :interface                            => 'internal',
         })
       end
 
@@ -140,6 +142,7 @@ describe 'barbican::keystone::authtoken' do
         is_expected.to contain_barbican_config('keystone_authtoken/token_cache_time').with_value(params[:token_cache_time])
         is_expected.to contain_barbican_config('keystone_authtoken/service_token_roles').with_value(params[:service_token_roles])
         is_expected.to contain_barbican_config('keystone_authtoken/service_token_roles_required').with_value(params[:service_token_roles_required])
+        is_expected.to contain_barbican_config('keystone_authtoken/interface').with_value(params[:interface])
       end
 
       it 'installs python memcache package' do