diff --git a/tools/yaml-validate.py b/tools/yaml-validate.py
index 7c04954a8d..c6e518589a 100755
--- a/tools/yaml-validate.py
+++ b/tools/yaml-validate.py
@@ -26,7 +26,8 @@ ENDPOINT_MAP_FILE = 'endpoint_map.yaml'
 REQUIRED_DOCKER_SECTIONS = ['service_name', 'docker_config', 'kolla_config',
                             'puppet_config', 'config_settings', 'step_config']
 OPTIONAL_DOCKER_SECTIONS = ['docker_puppet_tasks', 'upgrade_tasks',
-                            'service_config_settings', 'host_prep_tasks']
+                            'service_config_settings', 'host_prep_tasks',
+                            'metadata_settings']
 DOCKER_PUPPET_CONFIG_SECTIONS = ['config_volume', 'puppet_tags', 'step_config',
                                  'config_image']