diff --git a/test/iterator_adaptor_test.cpp b/test/iterator_adaptor_test.cpp
index dcb04b5..727f12b 100644
--- a/test/iterator_adaptor_test.cpp
+++ b/test/iterator_adaptor_test.cpp
@@ -155,8 +155,6 @@ public:
   in_iterator(boost::input_iterator_archetype<T> d) : super_t(d) { }
 };
 
-template <class T> struct undefined;
-
 int
 main()
 {
@@ -199,8 +197,6 @@ main()
 
     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));