diff --git a/test/iterator_adaptor_test.cpp b/test/iterator_adaptor_test.cpp
index a06d340..dcb04b5 100644
--- a/test/iterator_adaptor_test.cpp
+++ b/test/iterator_adaptor_test.cpp
@@ -155,6 +155,8 @@ public:
   in_iterator(boost::input_iterator_archetype<T> d) : super_t(d) { }
 };
 
+template <class T> struct undefined;
+
 int
 main()
 {
@@ -194,6 +196,11 @@ main()
     typedef ptr_iterator<int const> Iter1;
     BOOST_STATIC_ASSERT((boost::is_same<Iter1::value_type, int>::value));
     BOOST_STATIC_ASSERT((boost::is_same<Iter1::reference, const int&>::value));
+
+    BOOST_STATIC_ASSERT((boost::is_same<Iter1::iterator_category::returns, boost::readable_lvalue_iterator_tag>::value));
+
+    undefined<Iter1::iterator_category> un;
+
 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
     // Borland has known problems with const
     BOOST_STATIC_ASSERT((boost::is_same<Iter1::pointer, const int*>::value));