diff --git a/include/boost/date_time/time_parsing.hpp b/include/boost/date_time/time_parsing.hpp
index 98bedbf0..592dfbaa 100644
--- a/include/boost/date_time/time_parsing.hpp
+++ b/include/boost/date_time/time_parsing.hpp
@@ -99,7 +99,7 @@ namespace date_time {
           fs = _atoi64(beg->c_str());
         }
 #else
-        int precision = time_duration::num_fractional_digits();
+        BOOST_CXX14_CONSTEXPR int precision = time_duration::num_fractional_digits();
         if(digits >= precision) {
           // drop excess digits
           fs = boost::lexical_cast<boost::int64_t>(beg->substr(0, precision));
diff --git a/include/boost/date_time/time_system_counted.hpp b/include/boost/date_time/time_system_counted.hpp
index 6c27aded..5221bc0f 100644
--- a/include/boost/date_time/time_system_counted.hpp
+++ b/include/boost/date_time/time_system_counted.hpp
@@ -93,9 +93,8 @@ namespace date_time {
     }
     static BOOST_CXX14_CONSTEXPR int_type frac_sec_per_day()
     {
-      int_type seconds_per_day = 60*60*24;
-      int_type fractional_sec_per_sec(resolution_traits::res_adjust());
-      return seconds_per_day*fractional_sec_per_sec;
+      BOOST_CXX14_CONSTEXPR int_type seconds_per_day = 60*60*24;
+      return seconds_per_day*resolution_traits::res_adjust();
     }
     BOOST_CXX14_CONSTEXPR bool is_pos_infinity()const
     {