diff --git a/libcxx/include/atomic b/libcxx/include/atomic
--- a/libcxx/include/atomic
+++ b/libcxx/include/atomic
@@ -1503,8 +1503,6 @@
     using __cxx_contention_t = int64_t;
 #endif //__linux__
 
-#if _LIBCPP_STD_VER >= 11
-
 using __cxx_atomic_contention_t = __cxx_atomic_impl<__cxx_contention_t>;
 
 #ifndef _LIBCPP_HAS_NO_PLATFORM_WAIT
@@ -1582,8 +1580,6 @@
     return __cxx_atomic_wait(__a, __test_fn);
 }
 
-#endif //_LIBCPP_STD_VER >= 11
-
 // general atomic<T>
 
 template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>