diff --git a/eo/src/EO.h b/eo/src/EO.h
index fb54364b..84552dad 100644
--- a/eo/src/EO.h
+++ b/eo/src/EO.h
@@ -74,6 +74,11 @@ public:
    */
   bool invalid() const { return invalidFitness; }
   
+  /** Returns true if 
+      @return true if the fitness is higher
+   */
+  bool operator<(const EO& _eo2) {  return fitness() < _eo2.fitness();}
+
   /// Methods inherited from eoObject
   //@{
   
@@ -112,9 +117,9 @@ private:
 
 //-----------------------------------------------------------------------------
 
-template<class T> bool operator<(const EO<T>& eo1, const EO<T>& eo2)
+template<class T> bool operator<(const EO<T>& _eo1, const EO<T>& _eo2)
 {
-  return eo1.fitness() < eo2.fitness();
+  return _eo1.fitness() < _eo2.fitness();
 }
 
 //-----------------------------------------------------------------------------
diff --git a/eo/src/Makefile.am b/eo/src/Makefile.am
index ab0d64da..f22bc979 100644
--- a/eo/src/Makefile.am
+++ b/eo/src/Makefile.am
@@ -5,6 +5,7 @@
 ###############################################################################
 
 lib_LTLIBRARIES = libeo.la
-libeo_la_SOURCES = eoObject.cpp eoPersistent.cpp eoPrintable.cpp
+libeo_la_SOURCES = 
+libeo_la_SOURCES =  eoPersistent.cpp eoPrint eoPersistent.cpp eoPrintable.cpp
 libeoincdir = $(includedir)/eo
 libeoinc_HEADERS = eo EO.h eoDup.h eoMultiMonOp.h eoPop.h eoUniform.h eoESChrom.h eoNegExp.h eoProblem.h eoVector.h eoFitness.h eoNormal.h eoRnd.h eoXOver2.h eo1d.h eoID.h eoObject.h eoString.h eoAged.h eoKill.h eoOp.h eoTranspose.h eoBin.h