Change default 'order' parameter to be a string Under Puppet 3.5.1 (and possibly earlier versions, too), the validate_string($order) fails when $order is actaully a numeric type. Apparently there is more strict type checking now. Can't just change validate_string to a is_numeric check, because it's fairly common to use strings like '01' for the order parameter, which doesn't pass the is_numeric test. Additionally, there is nothing saying that $order must be a number. Ultimately the ordering gets implemented as filesystem directory list sorting.