diff --git a/include/fmt/base.h b/include/fmt/base.h
index 50600334..ef9fd57d 100644
--- a/include/fmt/base.h
+++ b/include/fmt/base.h
@@ -1090,11 +1090,11 @@ struct use_format_as<
     : std::true_type {};
 
 template <typename T, typename U = remove_const_t<T>>
-struct use_formatter
-    : bool_constant<(std::is_class<T>::value || std::is_enum<T>::value ||
-                     std::is_union<T>::value || std::is_array<T>::value) &&
-                    !has_to_string_view<T>::value && !is_named_arg<T>::value &&
-                    !use_format_as<T>::value> {};
+using use_formatter =
+    bool_constant<(std::is_class<T>::value || std::is_enum<T>::value ||
+                   std::is_union<T>::value || std::is_array<T>::value) &&
+                  !has_to_string_view<T>::value && !is_named_arg<T>::value &&
+                  !use_format_as<T>::value>;
 
 template <typename Char, typename T, typename U = remove_const_t<T>>
 auto has_formatter_impl(T* p, buffered_context<Char>* ctx = nullptr)