--- a/vendor/magento/module-sales/Controller/Adminhtml/Invoice/AbstractInvoice/PrintAction.php
+++ b/vendor/magento/module-sales/Controller/Adminhtml/Invoice/AbstractInvoice/PrintAction.php
@@ -55,7 +55,7 @@ abstract class PrintAction extends \Magento\Backend\App\Action
                 \Magento\Sales\Api\InvoiceRepositoryInterface::class
             )->get($invoiceId);
             if ($invoice) {
-                $pdf = $this->_objectManager->create(\Magento\Sales\Model\Order\Pdf\Invoice::class)->getPdf([$invoice]);
+                $pdf = $this->_objectManager->create(\Dinhvan\Sales\Model\Order\Pdf\Invoice::class)->getPdf([$invoice]);
                 $date = $this->_objectManager->get(
                     \Magento\Framework\Stdlib\DateTime\DateTime::class
                 )->date('Y-m-d_H-i-s');