diff --git a/include/boost/generator_iterator.hpp b/include/boost/generator_iterator.hpp
index 2397288..bf8011f 100644
--- a/include/boost/generator_iterator.hpp
+++ b/include/boost/generator_iterator.hpp
@@ -24,15 +24,15 @@ class generator_iterator
   : public iterator_facade<
         generator_iterator<Generator>
       , typename Generator::result_type
-      , readable_lvalue_iterator_tag
       , single_pass_traversal_tag
+      , typename Generator::result_type const&
     >
 {
     typedef iterator_facade<
         generator_iterator<Generator>
       , typename Generator::result_type
-      , readable_iterator_tag
       , single_pass_traversal_tag
+      , typename Generator::result_type const&
     > super_t;
     
  public: