diff --git a/samples/cpp/tutorial_code/viz/histo3D.cpp b/samples/cpp/tutorial_code/viz/histo3D.cpp
index c01d756c2e..a3ef0aacba 100644
--- a/samples/cpp/tutorial_code/viz/histo3D.cpp
+++ b/samples/cpp/tutorial_code/viz/histo3D.cpp
@@ -163,7 +163,7 @@ int main (int argc,char **argv)
     waitKey(30);
     //! [slide_bar_for_thresh]
     //! [manage_viz_imshow_window]
-    h.fen3D = new viz::Viz3d("3D Histogram");
+    h.fen3D = makePtr<viz::Viz3d>("3D Histogram");
     h.nbWidget=0;
     h.fen3D->registerKeyboardCallback(KeyboardViz3d,&h);
     DrawHistogram3D(h);