diff --git a/STL_Extension/include/CGAL/Iterator_range.h b/STL_Extension/include/CGAL/Iterator_range.h
index c6df9741b90..8ea5cc8b11d 100644
--- a/STL_Extension/include/CGAL/Iterator_range.h
+++ b/STL_Extension/include/CGAL/Iterator_range.h
@@ -23,6 +23,8 @@
 #include <CGAL/tuple.h>
 #include <utility>
 
+//#include <boost/range.hpp>
+
 namespace CGAL {
 
   /*!
@@ -93,15 +95,6 @@ namespace CGAL {
 
 namespace boost {
   
-  template <typename X> 
-  struct range_iterator;
-
-  template <typename X> 
-  struct range_mutable_iterator;
-
-  template <typename X> 
-  struct range_const_iterator;
-
   template <typename T> 
   struct range_iterator<CGAL::Iterator_range<T> >
   {