diff --git a/cruft/util/ranges/chunk.hpp b/cruft/util/ranges/chunk.hpp
index 0dbc90f9..d4aae95a 100644
--- a/cruft/util/ranges/chunk.hpp
+++ b/cruft/util/ranges/chunk.hpp
@@ -219,16 +219,9 @@ namespace cruft::ranges {
     template <class R>
     chunk_view (R&&, std::ranges::range_difference_t<R>) -> chunk_view<std::views::all_t<R>>;
 
-    // HACK: clang#18 does not expose range_adaptor_closure, so we dig into the internals.
-#if defined(COMPILER_GCC)
-#define _CRUFT_RANGE_ADAPTOR_BASE std::ranges::range_adaptor_closure
-#elif defined(COMPILER_CLANG)
-#define _CRUFT_RANGE_ADAPTOR_BASE std::__range_adaptor_closure
-#endif
-
 
     namespace detail {
-        struct chunk_closure_t : _CRUFT_RANGE_ADAPTOR_BASE<chunk_closure_t> {
+        struct chunk_closure_t : std::ranges::range_adaptor_closure<chunk_closure_t> {
             int n;
 
             template <typename R>