diff --git a/include/boost/type_traits/is_integral.hpp b/include/boost/type_traits/is_integral.hpp
index 99420a9..b5089ec 100644
--- a/include/boost/type_traits/is_integral.hpp
+++ b/include/boost/type_traits/is_integral.hpp
@@ -68,6 +68,11 @@ BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(is_integral, ::boost::long_long_type,true)
 BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(is_integral,unsigned __int64,true)
 BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(is_integral,__int64,true)
 #endif
+        
+#ifdef BOOST_HAS_INT128
+BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(is_integral,boost::int128_type,true)
+BOOST_TT_AUX_BOOL_TRAIT_CV_SPEC1(is_integral,boost::uint128_type,true)
+#endif
 
 #endif  // non-CodeGear implementation
 
diff --git a/include/boost/type_traits/make_signed.hpp b/include/boost/type_traits/make_signed.hpp
index 51cfd95..7deb855 100644
--- a/include/boost/type_traits/make_signed.hpp
+++ b/include/boost/type_traits/make_signed.hpp
@@ -72,7 +72,15 @@ struct make_signed_imp
                      is_same<t_no_cv, unsigned long>,
                      long,
 #if defined(BOOST_HAS_LONG_LONG)
+#ifdef BOOST_HAS_INT128
+                     typename mpl::if_c<
+                        sizeof(t_no_cv) == sizeof(boost::long_long_type), 
+                        boost::long_long_type, 
+                        boost::int128_type
+                     >::type
+#else
                      boost::long_long_type
+#endif
 #elif defined(BOOST_HAS_MS_INT64)
                      __int64
 #else
@@ -96,7 +104,15 @@ struct make_signed_imp
                      sizeof(t_no_cv) == sizeof(unsigned long),
                      long,
 #if defined(BOOST_HAS_LONG_LONG)
+#ifdef BOOST_HAS_INT128
+                     typename mpl::if_c<
+                        sizeof(t_no_cv) == sizeof(boost::long_long_type), 
+                        boost::long_long_type, 
+                        boost::int128_type
+                     >::type
+#else
                      boost::long_long_type
+#endif
 #elif defined(BOOST_HAS_MS_INT64)
                      __int64
 #else
diff --git a/include/boost/type_traits/make_unsigned.hpp b/include/boost/type_traits/make_unsigned.hpp
index 54f9f66..7e2fcdc 100644
--- a/include/boost/type_traits/make_unsigned.hpp
+++ b/include/boost/type_traits/make_unsigned.hpp
@@ -72,7 +72,15 @@ struct make_unsigned_imp
                      is_same<t_no_cv, long>,
                      unsigned long,
 #if defined(BOOST_HAS_LONG_LONG)
+#ifdef BOOST_HAS_INT128
+                     typename mpl::if_c<
+                        sizeof(t_no_cv) == sizeof(boost::ulong_long_type), 
+                        boost::ulong_long_type, 
+                        boost::uint128_type
+                     >::type
+#else
                      boost::ulong_long_type
+#endif
 #elif defined(BOOST_HAS_MS_INT64)
                      unsigned __int64
 #else
@@ -96,7 +104,15 @@ struct make_unsigned_imp
                      sizeof(t_no_cv) == sizeof(unsigned long),
                      unsigned long,
 #if defined(BOOST_HAS_LONG_LONG)
+#ifdef BOOST_HAS_INT128
+                     typename mpl::if_c<
+                        sizeof(t_no_cv) == sizeof(boost::ulong_long_type), 
+                        boost::ulong_long_type, 
+                        boost::uint128_type
+                     >::type
+#else
                      boost::ulong_long_type
+#endif
 #elif defined(BOOST_HAS_MS_INT64)
                      unsigned __int64
 #else
diff --git a/test/is_integral_test.cpp b/test/is_integral_test.cpp
index 445e941..7b28824 100644
--- a/test/is_integral_test.cpp
+++ b/test/is_integral_test.cpp
@@ -112,6 +112,18 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<__int64 const volatile>::value,
 
 #endif
 
+#ifdef BOOST_HAS_INT128
+
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::uint128_type>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::int128_type>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::uint128_type const>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::int128_type const>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::uint128_type volatile>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::int128_type volatile>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::uint128_type const volatile>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_integral<boost::int128_type const volatile>::value, true);
+
+#endif
 //
 // cases that should not be true:
 //
diff --git a/test/is_signed_test.cpp b/test/is_signed_test.cpp
index 7e1a9a1..28bc070 100644
--- a/test/is_signed_test.cpp
+++ b/test/is_signed_test.cpp
@@ -31,6 +31,10 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_signed<int&&>::value, false);
 BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_signed<int*>::value, false);
 BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_signed<int[2]>::value, false);
 
+#ifdef BOOST_HAS_INT128
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_signed<boost::int128_type>::value, true);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_signed<boost::uint128_type>::value, false);
+#endif
 TT_TEST_END
 
 
diff --git a/test/is_unsigned_test.cpp b/test/is_unsigned_test.cpp
index 68c2574..68b0890 100644
--- a/test/is_unsigned_test.cpp
+++ b/test/is_unsigned_test.cpp
@@ -31,6 +31,11 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_unsigned<unsigned&&>::value, false);
 BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_unsigned<unsigned*>::value, false);
 BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_unsigned<unsigned[2]>::value, false);
 
+#ifdef BOOST_HAS_INT128
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_unsigned<boost::int128_type>::value, false);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_unsigned<boost::uint128_type>::value, true);
+#endif
+
 TT_TEST_END
 
 
diff --git a/test/make_signed_test.cpp b/test/make_signed_test.cpp
index af08bd5..cb9da2d 100644
--- a/test/make_signed_test.cpp
+++ b/test/make_signed_test.cpp
@@ -95,6 +95,10 @@ BOOST_CHECK_TYPE(::tt::make_signed<const volatile boost::ulong_long_type>::type,
 #elif defined(BOOST_HAS_MS_INT64)
 BOOST_CHECK_TYPE(::tt::make_signed<const volatile unsigned __int64>::type, const volatile __int64);
 #endif
+#ifdef BOOST_HAS_INT128
+BOOST_CHECK_TYPE(::tt::make_signed<boost::int128_type>::type, boost::int128_type);
+BOOST_CHECK_TYPE(::tt::make_signed<boost::uint128_type>::type, boost::int128_type);
+#endif
 
 // character types:
 BOOST_CHECK_TYPE(::tt::make_signed<char>::type, signed char);
diff --git a/test/make_unsigned_test.cpp b/test/make_unsigned_test.cpp
index 2ffe1b9..117a8e6 100644
--- a/test/make_unsigned_test.cpp
+++ b/test/make_unsigned_test.cpp
@@ -95,6 +95,10 @@ BOOST_CHECK_TYPE(::tt::make_unsigned<const volatile boost::ulong_long_type>::typ
 #elif defined(BOOST_HAS_MS_INT64)
 BOOST_CHECK_TYPE(::tt::make_unsigned<const volatile unsigned __int64>::type, const volatile unsigned __int64);
 #endif
+#ifdef BOOST_HAS_INT128
+BOOST_CHECK_TYPE(::tt::make_unsigned<boost::int128_type>::type, boost::uint128_type);
+BOOST_CHECK_TYPE(::tt::make_unsigned<boost::uint128_type>::type, boost::uint128_type);
+#endif
 
 // character types:
 BOOST_CHECK_TYPE(::tt::make_unsigned<char>::type, unsigned char);