diff -up boost_1_54_0/boost/unordered/detail/unique.hpp\~ boost_1_54_0/boost/unordered/detail/unique.hpp

--- boost_1_54_0/boost/unordered/detail/unique.hpp~	2012-12-05 23:06:57.000000000 +0100

+++ boost_1_54_0/boost/unordered/detail/unique.hpp	2013-07-22 23:54:29.222516306 +0200

@@ -334,8 +334,6 @@ namespace boost { namespace unordered { 

         value_type& operator[](key_type const& k)

         {

-            typedef typename value_type::second_type mapped_type;

-    

             std::size_t key_hash = this->hash(k);

             iterator pos = this->find_node(key_hash, k);

Diff finished.  Mon Jul 22 23:55:15 2013