diff --git a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
index 4ffd8360f4..c66620e49c 100644
--- a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
+++ b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
@@ -130,7 +130,7 @@ RiuSummaryQwtPlot::RiuSummaryQwtPlot(RimSummaryPlot* plotDefinition, QWidget* pa
     m_plotMarker = new QwtPlotMarker;
 
     // QwtPlotMarker takes ownership of the symbol, it is deleted in destructor of QwtPlotMarker
-    m_plotMarker->setSymbol(new QwtSymbol(QwtSymbol::Ellipse, Qt::NoBrush, QPen(Qt::black), QSize(9, 9)));
+    m_plotMarker->setSymbol(new QwtSymbol(QwtSymbol::Ellipse, Qt::NoBrush, QPen(Qt::black, 2.0), QSize(9, 9)));
 }
 
 //--------------------------------------------------------------------------------------------------