QCheckbox without text is right cropped

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);
    QWidget w;
    auto lay = new QHBoxLayout(&w);
    auto cbx = new QCheckBox();
    auto lbl = new QLabel("Label");
    lay->addWidget(cbx);
    lay->addWidget(lbl);
    lay->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding));
    w.show();
    return app.exec();
}