diff --git a/manifests/init.pp b/manifests/init.pp
index 82b159b6..9739480e 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -222,7 +222,7 @@ class octavia (
   $notification_driver                = $facts['os_service_default'],
   $notification_topics                = $facts['os_service_default'],
   $topic                              = 'octavia-rpc',
-  $purge_config                       = false,
+  Boolean $purge_config               = false,
 ) inherits octavia::params {
 
   include octavia::deps
diff --git a/manifests/policy.pp b/manifests/policy.pp
index c6fa49a0..a2893155 100644
--- a/manifests/policy.pp
+++ b/manifests/policy.pp
@@ -52,7 +52,7 @@ class octavia::policy (
   $policy_path          = '/etc/octavia/policy.yaml',
   $policy_default_rule  = $facts['os_service_default'],
   $policy_dirs          = $facts['os_service_default'],
-  $purge_config         = false,
+  Boolean $purge_config = false,
 ) {
 
   include octavia::deps