Index: boost/spirit/home/karma/numeric/uint.hpp
===================================================================
--- boost/spirit/home/karma/numeric/uint.hpp	(revision 62477)
+++ boost/spirit/home/karma/numeric/uint.hpp	(working copy)
@@ -12,6 +12,8 @@
 
 #include <limits>
 #include <boost/config.hpp>
+#include <boost/mpl/not.hpp>
+#include <boost/mpl/bool.hpp>
 
 #include <boost/spirit/home/support/common_terminals.hpp>
 #include <boost/spirit/home/support/string_traits.hpp>
@@ -236,7 +238,8 @@
             Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16,
             not_supported_radix, ());
 
-        BOOST_SPIRIT_ASSERT_MSG(!std::numeric_limits<T>::is_signed,
+        BOOST_SPIRIT_ASSERT_MSG(
+            mpl::not_< mpl::bool_< std::numeric_limits<T>::is_signed > >::value,
             signed_unsigned_mismatch, ());
 
         // int has a Attribute attached
@@ -299,7 +302,8 @@
             Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16,
             not_supported_radix, ());
 
-        BOOST_SPIRIT_ASSERT_MSG(!std::numeric_limits<T>::is_signed,
+        BOOST_SPIRIT_ASSERT_MSG(
+            mpl::not_< mpl::bool_< std::numeric_limits<T>::is_signed > >::value,
             signed_unsigned_mismatch, ());
 
         // A uint(1U) which additionally has an associated attribute emits