diff --git a/trunk/paradiseo-moeo/src/comparator/moeoFitnessComparator.h b/trunk/paradiseo-moeo/src/comparator/moeoFitnessComparator.h
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+/*
+* <moeoFitnessComparator.h>
+* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
+* (C) OPAC Team, LIFL, 2002-2007
+*
+* Arnaud Liefooghe
+* François Legillon 
+*
+* This software is governed by the CeCILL license under French law and
+* abiding by the rules of distribution of free software.  You can  use,
+* modify and/ or redistribute the software under the terms of the CeCILL
+* license as circulated by CEA, CNRS and INRIA at the following URL
+* "http://www.cecill.info".
+*
+* As a counterpart to the access to the source code and  rights to copy,
+* modify and redistribute granted by the license, users are provided only
+* with a limited warranty  and the software's author,  the holder of the
+* economic rights,  and the successive licensors  have only  limited liability.
+*
+* In this respect, the user's attention is drawn to the risks associated
+* with loading,  using,  modifying and/or developing or reproducing the
+* software by the user in light of its specific status of free software,
+* that may mean  that it is complicated to manipulate,  and  that  also
+* therefore means  that it is reserved for developers  and  experienced
+* professionals having in-depth computer knowledge. Users are therefore
+* encouraged to load and test the software's suitability as regards their
+* requirements in conditions enabling the security of their systems and/or
+* data to be ensured and,  more generally, to use and operate it in the
+* same conditions as regards security.
+* The fact that you are presently reading this means that you have had
+* knowledge of the CeCILL license and that you accept its terms.
+*
+* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
+* Contact: paradiseo-help@lists.gforge.inria.fr
+*
+*/
+//-----------------------------------------------------------------------------
+
+#ifndef MOEOFITNESSCOMPARATOR_H_
+#define MOEOFITNESSCOMPARATOR_H_
+
+#include <comparator/moeoComparator.h>
+
+/**
+ * Functor allowing to compare two solutions according to their fitness values
+ */
+template < class MOEOT >
+class moeoFitnessComparator : public moeoComparator < MOEOT >
+  {
+  public:
+
+    /**
+     * Returns true if _moeo1 < _moeo2 according to their fitness values
+     * @param _moeo1 the first solution
+     * @param _moeo2 the second solution
+     */
+    const bool operator()(const MOEOT & _moeo1, const MOEOT & _moeo2) 
+    {
+          return _moeo1.fitness() < _moeo2.fitness();
+    }
+
+  };
+
+#endif /*MOEOFITNESSCOMPARATOR_H_*/