--- ./boost_1_59_0/boost/spirit/home/qi/numeric/detail/real_impl.hpp	2015-07-15 00:38:56.000000000 +0200
+++ ./boost_1_59_0/boost/spirit/home/qi/numeric/detail/real_impl.hpp	2015-09-01 12:16:13.992250100 +0200
@@ -65,7 +65,7 @@
     {
         if (exp >= 0)
         {
-            std::size_t max_exp = std::numeric_limits<T>::max_exponent10;
+            int const max_exp = std::numeric_limits<T>::max_exponent10;
             
             // return false if exp exceeds the max_exp
             // do this check only for primitive types!
@@ -77,7 +77,7 @@
         {
             if (exp < std::numeric_limits<T>::min_exponent10)
             {
-                int min_exp = std::numeric_limits<T>::min_exponent10;
+                int const min_exp = std::numeric_limits<T>::min_exponent10;
                 detail::compensate_roundoff(n, acc_n);
                 n /= pow10<T>(-min_exp);