diff --git a/include/boost/math/tools/big_constant.hpp b/include/boost/math/tools/big_constant.hpp
index a6f7bc0f1..b74a7c488 100644
--- a/include/boost/math/tools/big_constant.hpp
+++ b/include/boost/math/tools/big_constant.hpp
@@ -12,6 +12,7 @@
 #include <boost/lexical_cast.hpp>
 #endif
 #include <boost/type_traits/is_convertible.hpp>
+#include <boost/type_traits/is_floating_point.hpp>
 
 namespace boost{ namespace math{ 
 
@@ -66,9 +67,9 @@ inline BOOST_MATH_CONSTEXPR T make_big_value(largest_float, const char* s, mpl::
    boost::math::tools::make_big_value<T>(\
       BOOST_MATH_LARGEST_FLOAT_C(x), \
       BOOST_STRINGIZE(x), \
-      mpl::bool_< (is_convertible<boost::math::tools::largest_float, T>::value) && \
+      boost::mpl::bool_< (boost::is_convertible<boost::math::tools::largest_float, T>::value) && \
       ((D <= boost::math::tools::numeric_traits<boost::math::tools::largest_float>::digits) \
-          || is_floating_point<T>::value \
+          || boost::is_floating_point<T>::value \
           || (boost::math::tools::numeric_traits<T>::is_specialized && \
           (boost::math::tools::numeric_traits<T>::digits10 <= boost::math::tools::numeric_traits<boost::math::tools::largest_float>::digits10))) >(), \
       boost::is_convertible<const char*, T>())