Mpdf v7 fatal error

[fl0pp]

I try to generate a PDF from your samples, but get an Fatal error:

Fatal error: Uncaught TypeError: Argument 1 passed to PhpOffice\PhpSpreadsheet\Writer\PDF\MPDF::__construct() must be an instance of PhpOffice\PhpSpreadsheet\Spreadsheet, none given, called in <mypath>\vendor\PhpSpreadsheet\src\PhpSpreadsheet\Writer\PDF\MPDF.php on line 92 and defined in <mypath>\vendor\PhpSpreadsheet\src\PhpSpreadsheet\Writer\PDF\MPDF.php on line 42

• PhpSpreadsheet develop branch (commit 3cc80bd)
• Mpdf v 7.0.0
• PHP v 7.0.10RC1
• OS: Windows 8.1

When I load Mpdf separatly, and use namespaces it works.
I changed the line src\PhpSpreadsheet\Writer\PDF\MPDF.php:92 from

$pdf = new self();

to

$pdf = new \Mpdf\Mpdf();