Index: boost/random/uniform_int.hpp
===================================================================
--- boost/random/uniform_int.hpp	(revision 46390)
+++ boost/random/uniform_int.hpp	(working copy)
@@ -25,6 +25,7 @@
 #include <boost/detail/workaround.hpp>
 #include <boost/random/uniform_smallint.hpp>
 #include <boost/random/detail/signed_unsigned_tools.hpp>
+#include <boost/type_traits/make_unsigned.hpp>
 #ifdef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
 #include <boost/type_traits/is_float.hpp>
 #endif
@@ -38,7 +39,7 @@
 public:
   typedef IntType input_type;
   typedef IntType result_type;
-  typedef typename random::detail::make_unsigned<result_type>::type range_type;
+  typedef typename make_unsigned<result_type>::type range_type;
 
   explicit uniform_int(IntType min_arg = 0, IntType max_arg = 9)
     : _min(min_arg), _max(max_arg)
@@ -61,7 +62,7 @@
   {
     typedef typename Engine::result_type base_result;
     // ranges are always unsigned
-    typedef typename random::detail::make_unsigned<base_result>::type base_unsigned;
+    typedef typename make_unsigned<base_result>::type base_unsigned;
     const base_result bmin = (eng.min)();
     const base_unsigned brange =
       random::detail::subtract<base_result>()((eng.max)(), (eng.min)());
Index: boost/random/detail/signed_unsigned_tools.hpp
===================================================================
--- boost/random/detail/signed_unsigned_tools.hpp	(revision 46390)
+++ boost/random/detail/signed_unsigned_tools.hpp	(working copy)
@@ -13,88 +13,13 @@
 
 #include <boost/limits.hpp>
 #include <boost/config.hpp>
+#include <boost/type_traits/make_unsigned.hpp>
 
 namespace boost {
 namespace random {
 namespace detail {
 
-/*
- * Given an (integral) type T, returns the type "unsigned T".
- * (type_traits appears to be lacking the feature)
- */
 
-template<class T>
-struct make_unsigned { };
-
-template<>
-struct make_unsigned<char>
-{
-  typedef unsigned char type;
-};
-
-template<>
-struct make_unsigned<signed char>
-{
-  typedef unsigned char type;
-};
-
-template<>
-struct make_unsigned<unsigned char>
-{
-  typedef unsigned char type;
-};
-
-template<>
-struct make_unsigned<short>
-{
-  typedef unsigned short type;
-};
-
-template<>
-struct make_unsigned<unsigned short>
-{
-  typedef unsigned short type;
-};
-
-template<>
-struct make_unsigned<int>
-{
-  typedef unsigned int type;
-};
-
-template<>
-struct make_unsigned<unsigned int>
-{
-  typedef unsigned int type;
-};
-
-template<>
-struct make_unsigned<long>
-{
-  typedef unsigned long type;
-};
-
-template<>
-struct make_unsigned<unsigned long>
-{
-  typedef unsigned long type;
-};
-
-#ifdef BOOST_HAS_LONG_LONG
-template<>
-struct make_unsigned<long long>
-{
-  typedef unsigned long long type;
-};
-
-template<>
-struct make_unsigned<unsigned long long>
-{
-  typedef unsigned long long type;
-};
-#endif
-
-
 /*
  * Compute x - y, we know that x >= y, return an unsigned value.
  */