diff --git a/libcxx/include/__ranges/concepts.h b/libcxx/include/__ranges/concepts.h
--- a/libcxx/include/__ranges/concepts.h
+++ b/libcxx/include/__ranges/concepts.h
@@ -68,8 +68,6 @@
   template <range _Rp>
   using range_rvalue_reference_t = iter_rvalue_reference_t<iterator_t<_Rp>>;
 
-#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
-
   // [range.sized]
   template <class _Tp>
   concept sized_range = range<_Tp> && requires(_Tp& __t) { ranges::size(__t); };
@@ -135,8 +133,6 @@
       (is_lvalue_reference_v<_Tp> ||
        (movable<remove_reference_t<_Tp>> && !__is_std_initializer_list<remove_cvref_t<_Tp>>))));
 
-#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
-
 } // namespace ranges
 
 #endif // _LIBCPP_STD_VER > 17