diff --git a/senlinclient/v1/cluster.py b/senlinclient/v1/cluster.py
index 1b424e4e..841a567b 100644
--- a/senlinclient/v1/cluster.py
+++ b/senlinclient/v1/cluster.py
@@ -522,7 +522,7 @@ class ClusterPolicyAttach(command.Command):
         parser = super(ClusterPolicyAttach, self).get_parser(prog_name)
         parser.add_argument(
             '--enabled',
-            metavar='<enabled>',
+            metavar='<boolean>',
             default=True,
             help=_('Whether the policy should be enabled once attached. '
                    'Default to True')
diff --git a/senlinclient/v1/shell.py b/senlinclient/v1/shell.py
index 20e89137..c4132c3c 100644
--- a/senlinclient/v1/shell.py
+++ b/senlinclient/v1/shell.py
@@ -1012,7 +1012,7 @@ def do_cluster_policy_show(service, args):
 
 @utils.arg('-p', '--policy', metavar='<POLICY>', required=True,
            help=_('ID or name of policy to be attached.'))
-@utils.arg('-e', '--enabled', metavar='<enabled>', default=True,
+@utils.arg('-e', '--enabled', metavar='<BOOLEAN>', default=True,
            help=_('Whether the policy should be enabled once attached. '
                   'Default to enabled.'))
 @utils.arg('id', metavar='<NAME or ID>',