--- include/boxed-cpp/boxed.hpp.orig	Sat Mar  2 09:46:41 2024
+++ include/boxed-cpp/boxed.hpp	Tue Jun 25 22:57:30 2024
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: Apache-2.0
 #pragma once
 
+#include <compare>
 #include <iostream>
 #include <limits>
 #include <type_traits>
@@ -217,6 +218,8 @@ namespace fmt
 template <typename Type, typename Tag>
 struct fmt::formatter<boxed::detail::boxed<Type, Tag>>
 {
+    constexpr auto parse(fmt::format_parse_context& ctx) { return ctx.begin(); }
+
     auto format(boxed::detail::boxed<Type, Tag> const& val, fmt::format_context& ctx)
     {
         return fmt::format_to(ctx.out(), "{}", val.value);
