QXmlStreamReader can not parce tagname with num

<?xml version="1.0" encoding="UTF-8"?>
<val>
            <d>6613</d>
            <1>128529</1>
            <2>57625</2>
            <3>80314</3>
</val> 

In qt 5 Xml as a same can not be parced using QXmlStreamReader when i try to get <1> tag i get Invalid in QXmlStreamReader::readNext() method. Please fix