Win7: Fusion style sort indicator is upside down

#include <QtGui>
#include <QtWidgets>
#include <QtCore>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QMainWindow *window = new QMainWindow;
    QTableView *tableView = new QTableView;
    window->setCentralWidget(tableView);
    tableView->setSortingEnabled(true);

    QApplication::setStyle(QStyleFactory::create("Fusion"));

    QStandardItemModel *model = new QStandardItemModel;
    model->appendRow(QList<QStandardItem*>() <<  new QStandardItem("a"));
    model->appendRow(QList<QStandardItem*>() <<  new QStandardItem("b"));
    model->appendRow(QList<QStandardItem*>() <<  new QStandardItem("c"));

    tableView->setModel(model);

    window->show();
    return a.exec();
}