diff --git a/include/VisitorUtils.hpp b/include/VisitorUtils.hpp
index 1f2f181d..084bdbe1 100644
--- a/include/VisitorUtils.hpp
+++ b/include/VisitorUtils.hpp
@@ -44,9 +44,8 @@ namespace eddic {
  * \param visitable The object to visit. 
  * \return The result of the visit. 
  */
-template<typename Visitor, typename Visitable>
-inline typename std::enable_if<!std::is_void<typename Visitor::result_type>::value, typename Visitor::result_type>::type 
-visit(Visitor&& visitor, Visitable& visitable){
+template <typename Visitor, typename Visitable>
+inline Visitor::result_type visit(Visitor && visitor, Visitable & visitable) {
     return boost::apply_visitor(std::forward<Visitor>(visitor), visitable);
 }
 
@@ -56,34 +55,11 @@ visit(Visitor&& visitor, Visitable& visitable){
  * \param visitable The object to visit. 
  * \return The result of the visit. 
  */
-template<typename Visitor, typename Visitable>
-inline typename std::enable_if<!std::is_void<typename Visitor::result_type>::value, typename Visitor::result_type>::type 
-visit(Visitor&& visitor, const Visitable& visitable){
+template <typename Visitor, typename Visitable>
+inline Visitor::result_type visit(Visitor && visitor, const Visitable & visitable) {
     return boost::apply_visitor(std::forward<Visitor>(visitor), visitable);
 }
 
-/*!
- * Apply the visitor to the given object. 
- * \param visitor The visitor to apply. 
- * \param visitable The object to visit. 
- */
-template<typename Visitor, typename Visitable>
-inline typename std::enable_if<std::is_void<typename Visitor::result_type>::value, typename Visitor::result_type>::type
-visit(Visitor&& visitor, Visitable& visitable){
-    boost::apply_visitor(std::forward<Visitor>(visitor), visitable);
-}
-
-/*!
- * Apply the visitor to the given object. 
- * \param visitor The visitor to apply. 
- * \param visitable The object to visit. 
- */
-template<typename Visitor, typename Visitable>
-inline typename std::enable_if<std::is_void<typename Visitor::result_type>::value, typename Visitor::result_type>::type
-visit(Visitor&& visitor, const Visitable& visitable){
-    boost::apply_visitor(std::forward<Visitor>(visitor), visitable);
-}
-
 /*!
  * Apply the visitor to the given object. 
  * \param visitor The visitor to apply.