diff --git a/include/boxed-cpp/boxed.hpp b/include/boxed-cpp/boxed.hpp
index 56fd786..3986c8b 100644
--- a/include/boxed-cpp/boxed.hpp
+++ b/include/boxed-cpp/boxed.hpp
@@ -218,6 +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);