diff --git a/tl/expected.hpp b/tl/expected.hpp
index 47ceb8a..e00a248 100644
--- a/tl/expected.hpp
+++ b/tl/expected.hpp
@@ -2016,7 +2016,7 @@ template <class Exp, class F,
           detail::enable_if_t<!std::is_void<Ret>::value> * = nullptr>
 constexpr auto map_error_impl(Exp &&exp, F &&f)
     -> expected<exp_t<Exp>, detail::decay_t<Ret>> {
-  using result = ret_t<Exp, detail::decay_t<Ret>>;
+  using result = expected<exp_t<Exp>, detail::decay_t<Ret>>;
 
   return exp.has_value()
              ? result(*std::forward<Exp>(exp))