diff --git a/Solver_interface/include/CGAL/Default_diagonalize_traits.h b/Solver_interface/include/CGAL/Default_diagonalize_traits.h
index 42b320ee118..9f505285995 100644
--- a/Solver_interface/include/CGAL/Default_diagonalize_traits.h
+++ b/Solver_interface/include/CGAL/Default_diagonalize_traits.h
@@ -1,3 +1,21 @@
+// Copyright (c) 2015 GeometryFactory (France), 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; either version 3 of the License,
+// or (at your option) any later version.
+//
+// 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)     : Simon Giraudot
+
 #ifndef CGAL_DEFAULT_DIAGONALIZE_TRAITS_H
 #define CGAL_DEFAULT_DIAGONALIZE_TRAITS_H
 
diff --git a/Solver_interface/include/CGAL/Diagonalize_traits.h b/Solver_interface/include/CGAL/Diagonalize_traits.h
index fc7c15cd513..16773f19cdd 100644
--- a/Solver_interface/include/CGAL/Diagonalize_traits.h
+++ b/Solver_interface/include/CGAL/Diagonalize_traits.h
@@ -1,3 +1,22 @@
+// Copyright (c) 2015 GeometryFactory (France), 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; either version 3 of the License,
+// or (at your option) any later version.
+//
+// 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)     : Simon Giraudot
+
+
 #ifndef CGAL_DIAGONALIZE_TRAITS_H
 #define CGAL_DIAGONALIZE_TRAITS_H
 
diff --git a/Solver_interface/include/CGAL/Eigen_diagonalize_traits.h b/Solver_interface/include/CGAL/Eigen_diagonalize_traits.h
index aa0b27c13d9..4065aae1590 100644
--- a/Solver_interface/include/CGAL/Eigen_diagonalize_traits.h
+++ b/Solver_interface/include/CGAL/Eigen_diagonalize_traits.h
@@ -1,10 +1,10 @@
 // Copyright (c) 2014  INRIA Sophia-Antipolis (France).
 // 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
-// General Public License as published by the Free Software Foundation,
-// either version 3 of the License, or (at your option) any later version.
+// 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; either version 3 of the License,
+// or (at your option) any later version.
 //
 // Licensees holding a valid commercial license may use this file in
 // accordance with the commercial license agreement provided with the software.
diff --git a/Solver_interface/include/CGAL/Lapack_svd.h b/Solver_interface/include/CGAL/Lapack_svd.h
index 3312236e873..b4c67403c0d 100644
--- a/Solver_interface/include/CGAL/Lapack_svd.h
+++ b/Solver_interface/include/CGAL/Lapack_svd.h
@@ -1,10 +1,10 @@
 // Copyright (c) 2007  INRIA Sophia-Antipolis (France), INRIA Lorraine LORIA.
 // 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
-// General Public License as published by the Free Software Foundation,
-// either version 3 of the License, or (at your option) any later version.
+// 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; either version 3 of the License,
+// or (at your option) any later version.
 //
 // Licensees holding a valid commercial license may use this file in
 // accordance with the commercial license agreement provided with the software.