diff --git a/GraphicsView/demo/GraphicsView/QTriangulationCircumcenter_2.h b/GraphicsView/demo/GraphicsView/QTriangulationCircumcenter_2.h
index 9a751214a9e..ef48fde7197 100644
--- a/GraphicsView/demo/GraphicsView/QTriangulationCircumcenter_2.h
+++ b/GraphicsView/demo/GraphicsView/QTriangulationCircumcenter_2.h
@@ -41,7 +41,7 @@ private:
 
 template <typename T>
 QTriangulationCircumcenter_2<T>::QTriangulationCircumcenter_2(QGraphicsScene* s,
-                                                              T * dt_
+                                                              T * dt_,
                                                               QObject* parent)
   :  QtInput(parent), dt(dt_), scene_(s)
 {
diff --git a/GraphicsView/demo/GraphicsView/QTriangulationMovingPoint_2.h b/GraphicsView/demo/GraphicsView/QTriangulationMovingPoint_2.h
index 656d0fe0939..2d0c390a0a2 100644
--- a/GraphicsView/demo/GraphicsView/QTriangulationMovingPoint_2.h
+++ b/GraphicsView/demo/GraphicsView/QTriangulationMovingPoint_2.h
@@ -19,7 +19,7 @@ public:
   typedef typename DT::Vertex_handle Vertex_handle;
   typedef typename DT::Point Point;
 
-  QTriangulationMovingPoint_2(DT  * dt_);
+  QTriangulationMovingPoint_2(DT  * dt_, QObject* parent);
 
 protected:
   void localize_and_insert_point(QPointF qt_point);