diff --git a/GraphicsView/include/CGAL/Qt/CircularArcGraphicsItem.h b/GraphicsView/include/CGAL/Qt/CircularArcGraphicsItem.h
index de1f55c0c42..19095e1af71 100644
--- a/GraphicsView/include/CGAL/Qt/CircularArcGraphicsItem.h
+++ b/GraphicsView/include/CGAL/Qt/CircularArcGraphicsItem.h
@@ -87,6 +87,7 @@ protected:
   QRectF bounding_rect;
 
   QPen edges_pen;
+  QPen vertices_pen;
 
   Circular_arc_2 arc_;
 };