diff --git a/.gitattributes b/.gitattributes
index d0ed96f4ffa..7a703150038 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2977,6 +2977,7 @@ Nef_S2/doc_tex/Nef_S2_ref/fig/shalfedge.pdf -text svneol=unset#application/pdf
 Nef_S2/doc_tex/Nef_S2_ref/fig/shalfloopB.eps -text svneol=unset#application/postscript
 Nef_S2/doc_tex/Nef_S2_ref/fig/shalfloopB.gif -text svneol=unset#image/gif
 Nef_S2/doc_tex/Nef_S2_ref/fig/shalfloopB.pdf -text svneol=unset#application/pdf
+Nef_S2/include/CGAL/IO/Nef_polyhedron_iostream_S2.h -text
 Number_types/doc_tex/NumberTypeSupport_ref/CORE_BigFloat.tex -text
 Number_types/doc_tex/NumberTypeSupport_ref/fundamental_types.tex -text
 Number_types/doc_tex/NumberTypeSupport_ref/open.tex -text
diff --git a/Nef_S2/include/CGAL/IO/Nef_polyhedron_iostream_S2.h b/Nef_S2/include/CGAL/IO/Nef_polyhedron_iostream_S2.h
new file mode 100644
index 00000000000..0e2d07bc8e5
--- /dev/null
+++ b/Nef_S2/include/CGAL/IO/Nef_polyhedron_iostream_S2.h
@@ -0,0 +1,56 @@
+// Copyright (c) 1997-2000  Max-Planck-Institute Saarbruecken (Germany).
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org); you may redistribute it under
+// the terms of the Q Public License version 1.0.
+// See the file LICENSE.QPL distributed with CGAL.
+//
+// Licensees holding a valid commercial license may use this file in
+// accordance with the commercial license agreement provided with the software.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// $URL: svn+ssh://hachenb@scm.gforge.inria.fr/svn/cgal/trunk/Nef_3/include/CGAL/IO/Nef_polyhedron_iostream_3.h $
+// $Id: Nef_polyhedron_iostream_3.h 38348 2007-04-19 17:29:45Z hachenb $
+// 
+//
+// Author(s)     : Peter Hachenberger <hachenberger@mpi-sb.mpg.de>
+
+#ifndef CGAL_NEF_POLYHEDRON_IOSTREAM_3_H
+#define CGAL_NEF_POLYHEDRON_IOSTREAM_3_H
+
+#include <CGAL/Nef_polyhedron_S2.h>
+#include <CGAL/Nef_3/SM_io_parser.h>
+
+CGAL_BEGIN_NAMESPACE
+
+/*
+template <typename Kernel, typename Items, typename Mark, typename Map>
+std::ostream& operator<<
+ (std::ostream& os, Nef_polyhedron_3<Kernel,Items,Mark>& NP)
+{
+  typedef typename Nef_polyhedron_3<Kernel,Items, Mark>::SNC_structure SNC_structure;
+#ifdef CGAL_NEF3_SORT_OUTPUT
+  CGAL::SNC_io_parser<SNC_structure> O(os, NP.snc(), true, true);
+#else
+  CGAL::SNC_io_parser<SNC_structure> O(os, NP.snc(), false, true);
+#endif
+  O.print();
+  return os;
+}
+*/
+
+template <typename Kernel, typename Items, typename Mark, typename SMap>
+std::istream& operator>>
+  (std::istream& is, Nef_polyhedron_S2<Kernel,Items, Mark, SMap>& NP)
+{
+  typedef typename Nef_polyhedron_S2<Kernel,Items,Mark, SMap>::Sphere_map Sphere_map;
+  CGAL::SM_io_parser<Sphere_map> I(is, NP.sphere_map());
+  I.read();
+  return is;
+}
+
+CGAL_END_NAMESPACE
+
+#endif //CGAL_NEF_POLYHEDRON_IOSTREAM_3_H