diff --git a/libs/util/include/psemek/util/enum.hpp b/libs/util/include/psemek/util/enum.hpp
index 9f9b8056..9a1c0cea 100644
--- a/libs/util/include/psemek/util/enum.hpp
+++ b/libs/util/include/psemek/util/enum.hpp
@@ -26,7 +26,7 @@ namespace psemek::util
 		: unknown_enum_value_exception_base
 	{
 		unknown_enum_value_exception(Enum value)
-			: unknown_enum_value_exception_base(to_string("unknown ", type_name<Enum>(), " value: ", static_cast<std::int64_t>(value)))
+			: unknown_enum_value_exception_base(to_string("unknown ", type_name<Enum>(), " value: ", static_cast<std::underlying_type_t<Enum>>(value)))
 			, value_(value)
 		{}