diff --git a/src/mainwindow.h b/src/mainwindow.h
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -44,7 +44,6 @@
 #include "channelmanager.h"
 #include "snapshotmanager.h"
 #include "plotmanager.h"
-#include "barplot.h"
 #include "datarecorder.h"
 #include "updatecheckdialog.h"
 
@@ -79,7 +78,6 @@ private:
     QList<QwtPlotCurve*> curves;
     ChannelManager channelMan;
     PlotManager* plotMan;
-    BarPlot barPlot;
     SnapshotManager snapshotMan;
     DataRecorder recorder;       // operated by `recordPanel`