diff --git a/include/bio/io/detail/tuple_record.hpp b/include/bio/io/detail/tuple_record.hpp
index c227681..88ad458 100644
--- a/include/bio/io/detail/tuple_record.hpp
+++ b/include/bio/io/detail/tuple_record.hpp
@@ -166,9 +166,9 @@ struct tuple_record : bio::meta::transfer_template_args_onto_t<field_types_, std
                   "You must give as many IDs as types to bio::io::detail::tuple_record.");
 
     //!\brief Clears containers that provide `.clear()` and (re-)initialises all other elements with `= {}`.
-    void clear() noexcept(noexcept(std::apply(expander, std::declval<tuple_record &>())))
+    void clear() noexcept(noexcept(std::apply(expander, std::declval<tuple_record &>().to_base())))
     {
-        std::apply(expander, *this);
+        std::apply(expander, to_base());
     }
 
     /*!\name Get accessors