diff --git a/lib/io.ex b/lib/io.ex
index 163e3ea..2a97263 100644
--- a/lib/io.ex
+++ b/lib/io.ex
@@ -81,4 +81,9 @@ defmodule Aja.IO do
   def to_iodata(data) do
     String.Chars.to_string(data)
   end
+
+  import Aja
+
+  @spec my_ord(Aja.OrdMap.t(:xxx, integer())) :: Aja.OrdMap.t(:xxx, integer())
+  def my_ord(ord(%{xxx: x})), do: ord(%{xxx: x + 1})
 end