diff --git a/Triangulation_3/include/CGAL/draw_triangulation_3.h b/Triangulation_3/include/CGAL/draw_triangulation_3.h
index 709bd15924f..8de53e720f0 100644
--- a/Triangulation_3/include/CGAL/draw_triangulation_3.h
+++ b/Triangulation_3/include/CGAL/draw_triangulation_3.h
@@ -51,12 +51,12 @@ struct DefaultColorFunctorT3
 template<class T3, class ColorFunctor>
 class SimpleTriangulation3ViewerQt : public Basic_viewer_qt
 {
-  typedef Basic_viewer_qt                 Base;
-  typedef typename T3::Vertex_handle Vertex_const_handle;
+  typedef Basic_viewer_qt                     Base;
+  typedef typename T3::Vertex_handle          Vertex_const_handle;
   typedef typename T3::Finite_edges_iterator  Edge_const_handle;
   typedef typename T3::Finite_facets_iterator Facet_const_handle;
-  typedef typename T3::Cell_handle         Cell_handle;
-  typedef typename T3::Point               Point;
+  typedef typename T3::Cell_handle            Cell_handle;
+  typedef typename T3::Point                  Point;
  
 public:
   /// Construct the viewer.