diff --git a/eo/src/Makefile.am b/eo/src/Makefile.am
index bb878cc8..88ca6f32 100644
--- a/eo/src/Makefile.am
+++ b/eo/src/Makefile.am
@@ -8,7 +8,7 @@ SUBDIRS = es ga gp utils other
 CPPFLAGS = -O2
 
 lib_LIBRARIES = libeo.a
-libeo_a_SOURCES = eoFunctorStore.cpp eoPersistent.cpp eoPrintable.cpp eoCtrlCContinue.cpp
+libeo_a_SOURCES = eoFunctorStore.cpp eoPersistent.cpp eoPrintable.cpp eoCtrlCContinue.cpp eoParetoFitness.cpp
 
 libeoincdir = $(includedir)/eo
 libeoinc_HEADERS = *.h eo
diff --git a/eo/src/eoParetoFitness.cpp b/eo/src/eoParetoFitness.cpp
new file mode 100644
index 00000000..908b2c9f
--- /dev/null
+++ b/eo/src/eoParetoFitness.cpp
@@ -0,0 +1,38 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+ 
+//-----------------------------------------------------------------------------
+// eoPareto.cpp
+// (c) EEAAX,1996-GeNeura Team,1998-Maarten Keijzer,2000-Marc Schoenauer 2002
+/*
+    This library is free software; 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 2 of the License, or (at your option) any later version.
+ 
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+ 
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@inria.fr
+             mak@dhi.dk
+*/
+//-----------------------------------------------------------------------------
+#ifdef _MSC_VER
+// to avoid long name warnings
+#pragma warning(disable:4786)
+#endif 
+
+#include "eoParetoFitness.h"
+
+
+// need to allocate the static variables of class eoVariableParetoTraits
+unsigned eoVariableParetoTraits::nObj;
+vector<bool> eoVariableParetoTraits::bObj;
+
+
diff --git a/eo/src/eoParetoFitness.h b/eo/src/eoParetoFitness.h
index e23cdc19..e6e4336c 100644
--- a/eo/src/eoParetoFitness.h
+++ b/eo/src/eoParetoFitness.h
@@ -85,11 +85,6 @@ private:
   static vector<bool> bObj;
 };
 
-// need to allocate these -> should probably be done in some cpp file!
-unsigned eoVariableParetoTraits::nObj;
-vector<bool> eoVariableParetoTraits::bObj;
-
-
 /**
   eoParetoFitness class: vector of doubles with overloaded comparison operators. Comparison is done
   on pareto dominance. The template argument FitnessTraits defaults to eoParetoFitnessTraits, which