diff --git a/trunk/paradiseo-mo/src/problems/eval/moPopBitEval.h b/trunk/paradiseo-mo/src/problems/eval/moPopBitEval.h
index 4780a7f6c..fcc4b13b7 100644
--- a/trunk/paradiseo-mo/src/problems/eval/moPopBitEval.h
+++ b/trunk/paradiseo-mo/src/problems/eval/moPopBitEval.h
@@ -65,9 +65,9 @@ public:
     		eval(_sol[s]);
         	double fit=0;
             for (unsigned int i = 0; i < _sol.size(); i++){
-            	fit+=pow(_sol[i].fitness(), p);
+	      fit+=pow((double) _sol[i].fitness(), (int) p);
             }
-            fit=pow(fit, (double)1/p);
+            fit=pow((double) fit, (double)1/p);
             _n.setSubFit(_sol[s].fitness());
             _n.fitness(fit);
             _sol[s][b]=!_sol[s][b];
diff --git a/trunk/problems/eval/oneMaxPopEval.h b/trunk/problems/eval/oneMaxPopEval.h
index 3b1032c21..ecd475ee6 100644
--- a/trunk/problems/eval/oneMaxPopEval.h
+++ b/trunk/problems/eval/oneMaxPopEval.h
@@ -49,9 +49,9 @@ public:
         for (unsigned int i = 0; i < _sol.size(); i++){
         	if(_sol[i].invalid())
         		eval(_sol[i]);
-        	fit+=pow(_sol[i].fitness(), p);
+        	fit+=pow((double) _sol[i].fitness(), (int) p);
         }
-        fit=pow(fit, (double)1/p);
+        fit=pow((double) fit, (double)1/p);
         _sol.fitness(fit);
     }