diff --git a/include/magic_enum_format.hpp b/include/magic_enum_format.hpp
index d34421b..cc81c8f 100644
--- a/include/magic_enum_format.hpp
+++ b/include/magic_enum_format.hpp
@@ -59,7 +59,7 @@ struct std::formatter<E, std::enable_if_t<std::is_enum_v<E> && magic_enum::custo
     static_assert(std::is_same_v<char, string_view::value_type>, "formatter requires string_view::value_type type same as char.");
     using D = std::decay_t<E>;
 
-    if constexpr (detail::supported<D>::value) {
+    if constexpr (magic_enum::detail::supported<D>::value) {
       if (const auto name = magic_enum::enum_name<D, magic_enum::as_flags<magic_enum::detail::is_flags_v<D>>>(e); !name.empty()) {
         return std::formatter<std::string_view, char>::format(std::string_view{name.data(), name.size()}, ctx);
       }