diff --git a/eo/src/do/make_algo_pareto.h b/eo/src/do/make_algo_pareto.h
index 726fa834..6231e4fe 100644
--- a/eo/src/do/make_algo_pareto.h
+++ b/eo/src/do/make_algo_pareto.h
@@ -49,7 +49,7 @@ public:
 
   struct WorthPair : public std::pair<WorthT, const EOT*>
   {
-    bool operator<(const WorthPair& other) const { return other.first < first; }
+    bool operator<(const WorthPair& other) const { return other.first < this->first; }
   };
 
   void operator()(eoPop<EOT>& _parents, eoPop<EOT>& _offspring)
diff --git a/eo/src/do/make_checkpoint_pareto.h b/eo/src/do/make_checkpoint_pareto.h
index d14d40da..b79f314f 100644
--- a/eo/src/do/make_checkpoint_pareto.h
+++ b/eo/src/do/make_checkpoint_pareto.h
@@ -147,8 +147,8 @@ eoCheckPoint<EOT>& do_make_checkpoint_pareto(eoParser& _parser, eoState& _state,
 #else
 	      char s[1024];
 	      std::ostrstream os2(s, 1022);
-	      os << "Obj. " << obj2 << std::ends; 
-	      fStat = new eoMOFitnessStat<EOT>(obj, s);
+	      os2 << "Obj. " << obj2 << std::ends; 
+	      fStat = new eoMOFitnessStat<EOT>(obj2, s);
 #endif
 	      _state.storeFunctor(fStat);
 	      bStat[obj2]=true;