Index: iterator_facade.hpp
===================================================================
--- iterator_facade.hpp	(revision 45421)
+++ iterator_facade.hpp	(working copy)
@@ -352,9 +352,9 @@
           : m_iter(iter)
         {}
 
-        operator reference() const
+        operator value_type() const
         {
-            return *m_iter;
+            return static_cast<value_type>(*m_iter);
         }
 
         operator_brackets_proxy& operator=(value_type const& val)