Wrong resolution of Icon in Windows (Toast) Notifications

QPixmap pm = icon.pixmap(size);    
if (pm.isNull()) {        
    tnd.dwInfoFlags = NIIF_INFO;    
} else {        
    if (pm.size() != size) {            
        qWarning("QSystemTrayIcon::showMessage: Wrong icon size (%dx%d), please add      standard one: %dx%d",                      
        pm.size().width(), pm.size().height(), size.width(), size.height());            
        pm = pm.scaled(size, Qt::IgnoreAspectRatio);        
    }        
    tnd.hBalloonIcon = qt_pixmapToWinHICON(pm);    
}