diff --git a/STL_Extension/include/CGAL/iterator.h b/STL_Extension/include/CGAL/iterator.h
index e395ab3c76f..acc6b5101a6 100644
--- a/STL_Extension/include/CGAL/iterator.h
+++ b/STL_Extension/include/CGAL/iterator.h
@@ -43,6 +43,8 @@ class Prevent_deref
   Prevent_deref<I>
   , I // base
   , I // value
+  , boost::use_default
+  , I
   >
 {
 public:
@@ -50,6 +52,8 @@ public:
   Prevent_deref<I>
   , I // base
   , I // value
+  , boost::use_default
+  , I
   > Base;
   typedef typename Base::reference reference;
   typedef typename std::pair<I, I> range;