diff --git a/src/ui/linechart/LinechartPlot.h b/src/ui/linechart/LinechartPlot.h
index be5c29bf9fff72f759b56f147a45c398878d5bc2..f47363dce19f742cc6f743b25f2cae6b32c535dd 100644
--- a/src/ui/linechart/LinechartPlot.h
+++ b/src/ui/linechart/LinechartPlot.h
@@ -45,7 +45,6 @@ This file is part of the PIXHAWK project
 #include <qwt_scale_draw.h>
 #include <qwt_scale_widget.h>
 #include <qwt_scale_engine.h>
-#include <qwt_compat.h>
 #include <qwt_plot.h>
 #include "ChartPlot.h"
 #include "MG.h"
@@ -134,14 +133,14 @@ protected:
 
 private:
     quint64 count;
-    QwtArray<double> ms;
-    QwtArray<double> value;
+    QVector<double> ms;
+    QVector<double> value;
     double mean;
     double median;
     double variance;
     unsigned int averageWindow;
-    QwtArray<double> outputMs;
-    QwtArray<double> outputValue;
+    QVector<double> outputMs;
+    QVector<double> outputValue;
 };