[boost] [accumulator] no type named 'result_type' in 'boost::fusion::void_'

Hi, I'm getting this error on trunk ../../../boost/accumulators/framework/extractor.hpp:36:74: error: no type named 'result_type' in 'boost::fusion::void_' typedef typename mpl::apply<AccumulatorSet, feature_type>::type::result_type type; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ I'm including #include <boost/accumulators/framework/accumulator_set.hpp> #include <boost/accumulators/statistics/count.hpp> If I add the following include everything is OK. #include <boost/accumulators/accumulators.hpp> Is this a know issue? Best, Vicente