diff --git a/mainwindow.h b/mainwindow.h
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -28,6 +28,8 @@
 #include <QSignalMapper>
 #include <qwt_plot_curve.h>
 
+#include "ui_about_dialog.h"
+
 namespace Ui {
 class MainWindow;
 }
@@ -58,6 +60,9 @@ private:
     QButtonGroup stopBitsButtons;
     QButtonGroup flowControlButtons;
 
+    QDialog aboutDialog;
+    void setupAboutDialog();
+
     QSerialPort serialPort;
 
     unsigned int numOfSamples;