diff --git a/mainwindow.h b/mainwindow.h
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -73,6 +73,8 @@ private:
     // note that serialPort should already have enough bytes present
     template<typename T> double readSampleAs();
 
+    bool skipByteRequested;
+
 private slots:
     void loadPortList();
     void loadBaudRateList();
@@ -88,6 +90,8 @@ private slots:
     void onDataReady();
     void onPortError(QSerialPort::SerialPortError error);
 
+    void skipByte();
+
     void onNumOfSamplesChanged(int value);
     void onAutoScaleChecked(bool checked);
     void onYScaleChanged();