--- boost_1_55_0/boost/date_time/time_resolution_traits.hpp	2009-06-06 12:25:55.000000000 +0100
+++ boost_1_55_0/boost/date_time/time_resolution_traits.hpp	2013-12-20 11:12:37.675551388 +0000
@@ -68,7 +68,7 @@
            typename frac_sec_type::int_type resolution_adjust,
 #endif
            unsigned short frac_digits,
-           typename v_type = boost::int32_t >
+           typename v_type = typename frac_sec_type::int_type >
   class time_resolution_traits {
   public:
     typedef typename frac_sec_type::int_type fractional_seconds_type;