diff --git a/counting_iterator_test.cpp b/counting_iterator_test.cpp
index dc999e6..c2afdf3 100644
--- a/counting_iterator_test.cpp
+++ b/counting_iterator_test.cpp
@@ -6,7 +6,9 @@
 //  See http://www.boost.org for most recent version including documentation.
 //
 // Revision History
+// 28 Jan 2001  Removed not_an_iterator detritus (David Abrahams)
 // 24 Jan 2001  Initial revision (David Abrahams)
+
 #include <boost/counting_iterator.hpp>
 #include <boost/detail/iterator.hpp>
 #include <climits>
@@ -37,8 +39,6 @@ template <class T> struct is_numeric
     };
 };
 
-struct not_an_iterator_tag {};
-
 // Special tests for RandomAccess CountingIterators.
 template <class CountingIterator>
 void category_test(