diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
index b181ac6..77bacbb 100644
--- a/include/boost/lexical_cast.hpp
+++ b/include/boost/lexical_cast.hpp
@@ -69,11 +69,6 @@
     throw_exception(bad_lexical_cast(typeid(Source), typeid(Target)))
 #endif
 
-// GCC 4.6 has some issues with int128 and uint128. Issues were fixed in GCC 4.7
-#if defined(BOOST_HAS_INT128) && (!defined(__GNUC__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 6))
-#define BOOST_LCAST_HAS_INT128
-#endif
-
 namespace boost
 {
     // exception used to indicate runtime lexical_cast failure
@@ -316,7 +311,7 @@ namespace boost {
         > {};
 #endif
 
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
         template <> struct stream_char_common< boost::int128_type >: public boost::mpl::identity< char > {};
         template <> struct stream_char_common< boost::uint128_type >: public boost::mpl::identity< char > {};
 #endif
@@ -613,7 +608,7 @@ namespace boost {
         BOOST_LCAST_DEF(unsigned __int64)
         BOOST_LCAST_DEF(         __int64)
 #endif
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
         BOOST_LCAST_DEF(boost::int128_type)
         BOOST_LCAST_DEF(boost::uint128_type)
 #endif
@@ -1836,7 +1831,7 @@ namespace boost {
             bool operator<<(         __int64 n)         { return shl_signed(n); }
 #endif
 
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
         bool operator<<(const boost::uint128_type& n)   { start = lcast_put_unsigned<Traits>(n, finish); return true; }
         bool operator<<(const boost::int128_type& n)    { return shl_signed(n); }
 #endif
@@ -2048,7 +2043,7 @@ namespace boost {
             bool operator>>(__int64& output)                    { return shr_signed(output); }
 #endif
 
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
             bool operator>>(boost::uint128_type& output)        { return shr_unsigned(output); }
             bool operator>>(boost::int128_type& output)         { return shr_signed(output); }
 #endif
@@ -2728,7 +2723,6 @@ namespace boost {
 
 #undef BOOST_LCAST_THROW_BAD_CAST
 #undef BOOST_LCAST_NO_WCHAR_T
-#undef BOOST_LCAST_HAS_INT128
 
 #endif // BOOST_LEXICAL_CAST_INCLUDED
 
diff --git a/test/lexical_cast_integral_types_test.cpp b/test/lexical_cast_integral_types_test.cpp
index 8eb10c9..4755071 100644
--- a/test/lexical_cast_integral_types_test.cpp
+++ b/test/lexical_cast_integral_types_test.cpp
@@ -48,10 +48,6 @@
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
-#if defined(BOOST_HAS_INT128) && (!defined(__GNUC__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 6))
-#define BOOST_LCAST_HAS_INT128
-#endif
-
 // Test all 65536 values if true:
 bool const lcast_test_small_integral_types_completely = false;
 
@@ -75,7 +71,7 @@ void test_conversion_from_to_uintmax_t();
 void test_conversion_from_to_longlong();
 void test_conversion_from_to_ulonglong();
 #endif
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
 void test_conversion_from_to_int128();
 void test_conversion_from_to_uint128();
 #endif
@@ -99,7 +95,7 @@ unit_test::test_suite *init_unit_test_suite(int, char *[])
     suite->add(BOOST_TEST_CASE(&test_conversion_from_to_longlong));
     suite->add(BOOST_TEST_CASE(&test_conversion_from_to_ulonglong));
 #endif
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
     suite->add(BOOST_TEST_CASE(&test_conversion_from_to_int128));
     suite->add(BOOST_TEST_CASE(&test_conversion_from_to_uint128));
 #endif
@@ -557,7 +553,7 @@ void test_conversion_from_to_ulonglong()
 #endif
 
 
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
 
 template <bool Specialized, class T>
 struct test_if_specialized {
@@ -621,7 +617,7 @@ void test_integral_conversions_on_min_max()
     test_integral_conversions_on_min_max_impl<__int64>();
 #endif
 
-#ifdef BOOST_LCAST_HAS_INT128
+#ifdef BOOST_HAS_INT128
     test_integral_conversions_on_min_max_impl<boost::int128_type>();
 #endif
 #endif