diff --git a/source/mijin/util/formattable.hpp b/source/mijin/util/formattable.hpp
index 7b1f914..95a4c2b 100644
--- a/source/mijin/util/formattable.hpp
+++ b/source/mijin/util/formattable.hpp
@@ -21,7 +21,7 @@ concept parse_result_type = requires
 };
 
 template<typename T, typename TParseContext>
-concept parseable_by_type = parse_result_type &&
+concept parseable_by_type = parse_result_type<T> &&
         requires(const T& object, TParseContext& parseContext)
 {
     { T::parseFormat(parseContext) } -> std::convertible_to<std::pair<typename TParseContext::iterator, typename T::parse_result_t>>;