diff --git a/include/boost/iterator_adaptors.hpp b/include/boost/iterator_adaptors.hpp
index 7058153..ed9579c 100644
--- a/include/boost/iterator_adaptors.hpp
+++ b/include/boost/iterator_adaptors.hpp
@@ -1,6 +1,9 @@
 // Copyright David Abrahams 2004. Distributed under the Boost
 // Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See www.boost.org/libs/iterator for documentation.
+
 #ifndef ITERATOR_ADAPTORS_DWA2004725_HPP
 # define ITERATOR_ADAPTORS_DWA2004725_HPP