FilteringSelect with placeholder

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.8/dojo/resources/dojo.css">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.8/dijit/themes/tundra/tundra.css">
<body class="tundra">
    <select id="select" name="test_select"
            data-dojo-type="dijit/form/FilteringSelect"
            data-dojo-props="
                value: '',
                placeHolder: 'Choose one',
                required: true", 
                width:200px>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>        
    </select>
</body>