diff --git a/isoimagewriter/mainwindow.h b/isoimagewriter/mainwindow.h
index ba45b81..6efca16 100644
--- a/isoimagewriter/mainwindow.h
+++ b/isoimagewriter/mainwindow.h
@@ -1,45 +1,47 @@
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
 
 #include "usbdevice.h"
 
 #include <QMainWindow>
 #include <QLineEdit>
 #include <QComboBox>
 #include <QPushButton>
 #include <QStackedWidget>
 
 class MainWindow : public QMainWindow
 {
+    Q_OBJECT
+
 public:
     MainWindow(QWidget *parent = nullptr);
 
 public slots:
     void scheduleEnumFlashDevices();
 
 private:
     QLineEdit *m_isoImageLineEdit;
     QComboBox *m_usbDriveComboBox;
     QPushButton *m_createButton;
     QStackedWidget *m_centralStackedWidget;
 
     QString m_isoImagePath;
     quint64 m_isoImageSize;
     QString m_lastOpenedDir;
     bool m_isWriting;
     bool m_enumFlashDevicesWaiting;
 
     void setupUi();
     QWidget* createFormWidget();
     QWidget* createConfirmWidget();
     void preprocessIsoImage(const QString& isoImagePath);
     void cleanUp();
     void enumFlashDevices();
 
     static void addFlashDeviceCallback(void* cbParam, UsbDevice* device);
 
 private slots:
     void openIsoImage();
 };
 
 #endif // MAINWINDOW_H