diff --git a/manifests/policy.pp b/manifests/policy.pp
index 4d4ec0feb..ed3de61df 100644
--- a/manifests/policy.pp
+++ b/manifests/policy.pp
@@ -32,6 +32,10 @@
 #   (Optional) Path to the keystone policy.yaml file
 #   Defaults to /etc/keystone/policy.yaml
 #
+# [*policy_default_rule*]
+#   (Optional) Default rule. Enforced when a requested rule is not found.
+#   Defaults to $::os_service_default.
+#
 # [*policy_dirs*]
 #   (Optional) Path to the keystone policy folder
 #   Defaults to $::os_service_default
@@ -46,6 +50,7 @@ class keystone::policy (
   $enforce_new_defaults = $::os_service_default,
   $policies             = {},
   $policy_path          = '/etc/keystone/policy.yaml',
+  $policy_default_rule  = $::os_service_default,
   $policy_dirs          = $::os_service_default,
   $purge_config         = false,
 ) {
@@ -70,6 +75,7 @@ class keystone::policy (
     enforce_scope        => $enforce_scope,
     enforce_new_defaults => $enforce_new_defaults,
     policy_file          => $policy_path,
+    policy_default_rule  => $policy_default_rule,
     policy_dirs          => $policy_dirs,
   }
 
diff --git a/releasenotes/notes/policy_default_rule-4600db5f90a7303c.yaml b/releasenotes/notes/policy_default_rule-4600db5f90a7303c.yaml
new file mode 100644
index 000000000..eca6f2c0e
--- /dev/null
+++ b/releasenotes/notes/policy_default_rule-4600db5f90a7303c.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``keystone::policy::policy_default_rule`` parameter has been added.
diff --git a/spec/classes/keystone_policy_spec.rb b/spec/classes/keystone_policy_spec.rb
index 61158910d..0f35f849a 100644
--- a/spec/classes/keystone_policy_spec.rb
+++ b/spec/classes/keystone_policy_spec.rb
@@ -9,6 +9,7 @@ describe 'keystone::policy' do
           :enforce_scope        => false,
           :enforce_new_defaults => false,
           :policy_path          => '/etc/keystone/policy.yaml',
+          :policy_default_rule  => 'default',
           :policy_dirs          => '/etc/keystone/policy.d',
           :policies             => {
             'context_is_admin' => {
@@ -37,6 +38,7 @@ describe 'keystone::policy' do
           :enforce_scope        => false,
           :enforce_new_defaults => false,
           :policy_file          => '/etc/keystone/policy.yaml',
+          :policy_default_rule  => 'default',
           :policy_dirs          => '/etc/keystone/policy.d',
         )
       end