diff --git a/eo/src/eoEvalFunc.h b/eo/src/eoEvalFunc.h
index 73a27bac..d3d07bd5 100644
--- a/eo/src/eoEvalFunc.h
+++ b/eo/src/eoEvalFunc.h
@@ -41,6 +41,9 @@
 template<class EOT> class eoEvalFunc : public eoUF<EOT&, void>
 {
     public :
+  
+        typedef EOT EOType;
+
 	typedef typename EOT::Fitness EOFitT;
 };