diff --git a/GraphicsView/demo/Segment_Delaunay_graph_2/Segment_voronoi_2.cpp b/GraphicsView/demo/Segment_Delaunay_graph_2/Segment_voronoi_2.cpp
index 0f8763c28bd..dd472baa3a4 100644
--- a/GraphicsView/demo/Segment_Delaunay_graph_2/Segment_voronoi_2.cpp
+++ b/GraphicsView/demo/Segment_Delaunay_graph_2/Segment_voronoi_2.cpp
@@ -84,16 +84,12 @@ private:
   }
 
 protected slots:
-void open(QString);
+ virtual void open(QString);
 
 public slots:
 
   void processInput(CGAL::Object o);
 
-  //  void on_actionShowDelaunay_toggled(bool checked);
-
-  //  void on_actionShowConstraints_toggled(bool checked);
-
   void on_actionInsertPolyline_toggled(bool checked);
   
   void on_actionClear_triggered();
@@ -121,6 +117,8 @@ MainWindow::MainWindow()
 {
   setupUi(this);
 
+  this->graphicsView->setAcceptDrops(false);
+
   // Add a GraphicItem for the SVD triangulation
   sdggi = new CGAL::Qt::SegmentDelaunayGraphGraphicsItem<SVD>(&svd);
   QColor segmentColor(::Qt::blue);