diff --git a/Triangulation/examples/Triangulation/convex_hull.cpp b/Triangulation/examples/Triangulation/convex_hull.cpp
index af042573c4d..47453ad37ca 100644
--- a/Triangulation/examples/Triangulation/convex_hull.cpp
+++ b/Triangulation/examples/Triangulation/convex_hull.cpp
@@ -4,8 +4,10 @@
 #include <CGAL/algorithm.h>
 #include <CGAL/Timer.h>
 #include <CGAL/assertions.h>
+#include <CGAL/NewKernel_d/Wrapper/Point_d.h>
 
 #include <iostream>
+#include <fstream>
 #include <iterator>
 #include <vector>
 
@@ -58,5 +60,17 @@ int main(int argc, char **argv)
   }
 
   std::cout << c << " points were actually inserted.\n";
+  std::ofstream ofs("/home/gimeno/test.txt");
+  //CGAL::set_binary_mode(ofs);
+  ofs << t;
+  ofs.close();
+  T t2(D);
+  std::ifstream ifs("/home/gimeno/test.txt");
+  //CGAL::set_binary_mode(ifs);
+  ifs >> t2;
+  ifs.close();
+  if(t.number_of_vertices() != t2.number_of_vertices())
+    return 1;
+  
   return 0;
 }
diff --git a/Triangulation/include/CGAL/Triangulation.h b/Triangulation/include/CGAL/Triangulation.h
index 23d1b3beb8a..e10eaaf898b 100644
--- a/Triangulation/include/CGAL/Triangulation.h
+++ b/Triangulation/include/CGAL/Triangulation.h
@@ -1408,12 +1408,19 @@ operator<<(std::ostream & os, const Triangulation<TT, TDS> & tr)
 
     // infinite vertex has index 0 (among all the vertices)
     index_of_vertex[tr.infinite_vertex()] = i++;
-    os << *tr.infinite_vertex() <<"\n";
+    if(is_ascii(os))
+      os << *tr.infinite_vertex() <<"\n";
+    else
+      write(os, *tr.infinite_vertex(), io_Read_write());
+       
     for( Vertex_iterator it = tr.vertices_begin(); it != tr.vertices_end(); ++it )
     {
         if( tr.is_infinite(it) )
             continue;
-        os << *it <<"\n"; // write the vertex
+        if(is_ascii(os))
+          os << *it <<"\n"; // write the vertex
+        else
+          write(os, *it, io_Read_write());
         index_of_vertex[it] = i++;
     }
     CGAL_assertion( i == n+1 );