diff --git a/Skin_surface_3/include/CGAL/Skin_surface_base_3.h b/Skin_surface_3/include/CGAL/Skin_surface_base_3.h
old mode 100644
new mode 100755
index 4f821ed01da..1ad01b0871d
--- a/Skin_surface_3/include/CGAL/Skin_surface_base_3.h
+++ b/Skin_surface_3/include/CGAL/Skin_surface_base_3.h
@@ -30,6 +30,7 @@
 #include <boost/random/linear_congruential.hpp>
 #include <boost/random/uniform_smallint.hpp>
 #include <boost/random/variate_generator.hpp>
+#include <boost/shared_ptr.hpp>
 
 // For the Weighted_converter
 #include <CGAL/Regular_triangulation_euclidean_traits_3.h>
@@ -88,7 +89,7 @@ private:
 
 public:
   typedef Anchor_point                                  Vertex_info;
-  typedef std::pair<Simplex, Quadratic_surface *>       Cell_info;
+  typedef std::pair<Simplex, boost::shared_ptr<Quadratic_surface> >       Cell_info;
 
 private:
   // Triangulated_mixed_complex:
diff --git a/Skin_surface_3/include/CGAL/Triangulated_mixed_complex_observer_3.h b/Skin_surface_3/include/CGAL/Triangulated_mixed_complex_observer_3.h
old mode 100644
new mode 100755
index db2ccf3cb91..1b57eadc474
--- a/Skin_surface_3/include/CGAL/Triangulated_mixed_complex_observer_3.h
+++ b/Skin_surface_3/include/CGAL/Triangulated_mixed_complex_observer_3.h
@@ -24,6 +24,8 @@
 #include <CGAL/Skin_surface_quadratic_surface_3.h>
 #include <CGAL/Triangulation_simplex_3.h>
 
+#include <boost/shared_ptr.hpp>
+
 namespace CGAL {
 
 template <class T>
@@ -162,7 +164,7 @@ public:
 
   FT shrink;
   Rt_Simplex prev_s;
-  Quadratic_surface *surf;
+  boost::shared_ptr<Quadratic_surface> surf;
 
   // c is the center of the orthogonal sphere
   // w is the weight of the orthogonal sphere
@@ -177,14 +179,14 @@ public:
       Q[1] = Q[3] = Q[4] = 0;
       Q[0] = Q[2] = Q[5] = orient;
 
-      surf = new Quadratic_surface(Q, c, s*w, (orient==1? 0 : 3));
+      surf = boost::shared_ptr<Quadratic_surface>(new Quadratic_surface(Q, c, s*w, (orient==1? 0 : 3)));
     } else {
       // Multiply with 1-s to make the function defining the 
       // skin surface implicitly continuous
       Q[1] = Q[3] = Q[4] = 0;
       Q[0] = Q[2] = Q[5] = orient*(1-s);
 
-      surf = new Quadratic_surface(Q, c, s*(1-s)*w, (orient==1? 0 : 3));
+      surf = boost::shared_ptr<Quadratic_surface>(new Quadratic_surface(Q, c, s*(1-s)*w, (orient==1? 0 : 3)));
     }
   }
 
@@ -204,7 +206,7 @@ public:
     Q[4] = orient*(-2*t.z()*t.y()/den);
     Q[5] = orient*(-  t.z()*t.z()/den + (1-s));
 
-    surf = new Quadratic_surface(Q, c, s*(1-s)*w, (orient==1? 1 : 2));
+    surf = boost::shared_ptr<Quadratic_surface>(new Quadratic_surface(Q, c, s*(1-s)*w, (orient==1? 1 : 2)));
   }
 
   Surface_RT Q[6];