diff --git a/eo/src/ga/make_genotype_ga.h b/eo/src/ga/make_genotype_ga.h
index f162328b..1ea3e110 100644
--- a/eo/src/ga/make_genotype_ga.h
+++ b/eo/src/ga/make_genotype_ga.h
@@ -61,19 +61,8 @@ template <class EOT>
 eoInit<EOT> & do_make_genotype(eoParser& _parser, eoState& _state, EOT)
 {
   // for bitstring, only thing needed is the size
-  unsigned theSize;
   // but it might have been already read in the definition fo the performance
-  eoParam* ptParam = _parser.getParamWithLongName(string("chromSize")); 
-
-  if (!ptParam)			   // not already defined: read it here
-    {
-      theSize = _parser.createParam(unsigned(10), "chromSize", "The length of the bitstrings", 'n',"Problem").value();
-    }
-  else				   // it was read before, get its value
-    {
-      eoValueParam<unsigned>* ptChromSize = dynamic_cast<eoValueParam<unsigned>*>(ptParam);
-      theSize = ptChromSize->value();
-    }
+  unsigned theSize = _parser.getORcreateParam(unsigned(10), "chromSize", "The length of the bitstrings", 'n',"Problem").value();
 
   // Then we can built a bitstring random initializer
   // based on boolean_generator class (see utils/rnd_generator.h)