Index: numeric.hpp
===================================================================
--- numeric.hpp	(revision 77198)
+++ numeric.hpp	(working copy)
@@ -40,7 +40,7 @@
     template< class SinglePassRange, class Value >
     inline Value accumulate( const SinglePassRange& rng, Value init )
     {
-        BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
+        BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
         return std::accumulate( boost::begin(rng), boost::end(rng), init );
     }