diff --git a/src/Charts/OverviewItems.cpp b/src/Charts/OverviewItems.cpp
index b7562d916..266ccbe76 100644
--- a/src/Charts/OverviewItems.cpp
+++ b/src/Charts/OverviewItems.cpp
@@ -793,14 +793,20 @@ TopNOverviewItem::TopNOverviewItem(ChartSpace *parent, QString name, QString sym
     this->type = OverviewItemType::TOPN;
     this->symbol = symbol;
 
-    RideMetricFactory &factory = RideMetricFactory::instance();
-    this->metric = const_cast<RideMetric*>(factory.rideMetric(symbol));
-    if (metric) units = metric->units(GlobalContext::context()->useMetricUnits);
-
     animator=new QPropertyAnimation(this, "transition");
 
     configwidget = new OverviewItemConfig(this);
     configwidget->hide();
+
+    configChanged(0);
+}
+
+void
+TopNOverviewItem::configChanged(qint32)
+{
+    RideMetricFactory &factory = RideMetricFactory::instance();
+    this->metric = const_cast<RideMetric*>(factory.rideMetric(symbol));
+    if (metric) units = metric->units(GlobalContext::context()->useMetricUnits);
 }
 
 TopNOverviewItem::~TopNOverviewItem()
diff --git a/src/Charts/OverviewItems.h b/src/Charts/OverviewItems.h
index 56a1df0d9..4248bd493 100644
--- a/src/Charts/OverviewItems.h
+++ b/src/Charts/OverviewItems.h
@@ -284,17 +284,18 @@ class TopNOverviewItem : public ChartSpaceItem
         int getTransition() const {return transition;}
         void setTransition(int x) { if (transition !=x) {transition=x; update();}}
 
-        bool sceneEvent(QEvent *event);
-        void itemPaint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *);
-        void itemGeometryChanged();
-        void setData(RideItem *) {} // doesn't support analysis view
-        void setDateRange(DateRange);
-        QRectF hotspot();
+        bool sceneEvent(QEvent *event) override;
+        void itemPaint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override;
+        void itemGeometryChanged() override;
+        void setData(RideItem *) override {} // doesn't support analysis view
+        void setDateRange(DateRange) override;
+        QRectF hotspot() override;
 
-        QWidget *config() { return configwidget; }
+        QWidget *config() override { return configwidget; }
 
         // create and config
         static ChartSpaceItem *create(ChartSpace *parent) { return new TopNOverviewItem(parent, "PowerIndex", "power_index"); }
+        void configChanged(qint32) override;
 
         QString symbol;
         RideMetric *metric;