diff --git a/Modular_arithmetic/include/CGAL/primes.h b/Modular_arithmetic/include/CGAL/primes.h
index fb296364bbf..b2a00682d80 100644
--- a/Modular_arithmetic/include/CGAL/primes.h
+++ b/Modular_arithmetic/include/CGAL/primes.h
@@ -1,3 +1,24 @@
+// Copyright (c) 2006-2007 Max-Planck-Institute Saarbruecken (Germany).
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation; version 2.1 of the License.
+// See the file LICENSE.LGPL 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.
+//
+// $URL$
+// $Id$
+//
+//
+// Author(s)     : Michael Hemmer    <hemmer@mpi-inf.mpg.de>
+//
+// =============================================================================
 
 #ifndef CGAL_PRIMES_H
 #define CGAL_PRIMES_H