diff --git a/manifests/config.pp b/manifests/config.pp
index 28a3b23b..25d564e3 100644
--- a/manifests/config.pp
+++ b/manifests/config.pp
@@ -28,10 +28,8 @@
 #   or Puppet catalog compilation will fail with duplicate resources.
 #
 class tempest::config (
-  $tempest_config        = {},
+  Hash $tempest_config = {},
 ) {
 
-  validate_legacy(Hash, 'validate_hash', $tempest_config)
-
   create_resources('tempest_config', $tempest_config)
 }