diff --git a/moeo/src/algo/moeoIBEA.h b/moeo/src/algo/moeoIBEA.h
index 928e8f5a0..7af91058b 100644
--- a/moeo/src/algo/moeoIBEA.h
+++ b/moeo/src/algo/moeoIBEA.h
@@ -160,7 +160,7 @@ public:
      * @param _op variation operators
      * @param _fitnessAssignment fitness assignment
      */
-    moeoIBEA (eoContinue < MOEOT > & _continuator, eoPopEvalFunc < MOEOT > & _popEval, eoGenOp < MOEOT > & _op, moeoExpBinaryIndicatorBasedFitnessAssignment < MOEOT >& _fitnessAssignment) :
+    moeoIBEA (eoContinue < MOEOT > & _continuator, eoPopEvalFunc < MOEOT > & _popEval, eoGenOp < MOEOT > & _op, moeoBinaryIndicatorBasedFitnessAssignment < MOEOT >& _fitnessAssignment) :
             defaultGenContinuator(0), continuator(_continuator), eval(defaultEval), defaultPopEval(eval), popEval(_popEval), select(2),
             selectMany(select,0.0), selectTransform(defaultSelect, defaultTransform), defaultSGAGenOp(defaultQuadOp, 1.0, defaultMonOp, 1.0), genBreed(select, _op), breed(genBreed), default_fitnessAssignment(NULL), fitnessAssignment(_fitnessAssignment), replace(fitnessAssignment, diversityAssignment)
     {}
@@ -173,7 +173,7 @@ public:
      * @param _op variation operators
      * @param _fitnessAssignment fitness assignment
      */
-    moeoIBEA (eoContinue < MOEOT > & _continuator, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > & _op, moeoExpBinaryIndicatorBasedFitnessAssignment < MOEOT >& _fitnessAssignment) :
+    moeoIBEA (eoContinue < MOEOT > & _continuator, eoEvalFunc < MOEOT > & _eval, eoGenOp < MOEOT > & _op, moeoBinaryIndicatorBasedFitnessAssignment < MOEOT >& _fitnessAssignment) :
             defaultGenContinuator(0), continuator(_continuator), eval(_eval), defaultPopEval(_eval), popEval(defaultPopEval), select(2),
             selectMany(select,0.0), selectTransform(defaultSelect, defaultTransform), defaultSGAGenOp(defaultQuadOp, 1.0, defaultMonOp, 1.0), genBreed(select, _op), breed(genBreed), default_fitnessAssignment(NULL), fitnessAssignment(_fitnessAssignment), replace(fitnessAssignment, diversityAssignment)
     {}
@@ -190,7 +190,7 @@ public:
      * Apply the algorithm to the population _pop until the stopping criteria is satified.
      * @param _pop the population
      */
-    virtual void operator () (eoPop < MOEOT > &_pop)
+    virtual void operator() (eoPop < MOEOT > &_pop)
     {
         eoPop < MOEOT > offspring, empty_pop;
         popEval (empty_pop, _pop);	// a first eval of _pop
@@ -260,7 +260,7 @@ protected:
     /** breeder */
     eoBreed < MOEOT > & breed;
     /** fitness assignment used in IBEA */
-    moeoExpBinaryIndicatorBasedFitnessAssignment < MOEOT >& fitnessAssignment;
+    moeoBinaryIndicatorBasedFitnessAssignment < MOEOT >& fitnessAssignment;
     moeoExpBinaryIndicatorBasedFitnessAssignment < MOEOT >* default_fitnessAssignment;
     /** dummy diversity assignment */
     moeoDummyDiversityAssignment < MOEOT > diversityAssignment;
diff --git a/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h b/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
index d84b052e9..cbcbb33c4 100644
--- a/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
+++ b/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
@@ -175,7 +175,7 @@ class moeoExpBinaryIndicatorBasedFitnessAssignment : public moeoBinaryIndicatorB
      * Compute every indicator value in values (values[i] = I(_v[i], _o))
      * @param _pop the population
      */
-    void computeValues(const eoPop < MOEOT > & _pop)
+    virtual void computeValues(const eoPop < MOEOT > & _pop)
     {
       values.clear();
       values.resize(_pop.size());
@@ -211,7 +211,7 @@ class moeoExpBinaryIndicatorBasedFitnessAssignment : public moeoBinaryIndicatorB
      * Returns the fitness value of the _idx th individual of the population
      * @param _idx the index
      */
-    Type computeFitness(const unsigned int _idx)
+    virtual Type computeFitness(const unsigned int _idx)
     {
       Type result(0.0);
       for (unsigned int i=0; i<values.size(); i++)