diff --git a/todo.md b/todo.md
index c572b65..881af34 100644
--- a/todo.md
+++ b/todo.md
@@ -84,7 +84,6 @@ far off:
 
 maybe:
 - rename Stack to Box?
-- make Combobox and Listbox satisfy sort.Interface?
 - indeterminate progress bars (not supported on Windows 2000)
 - should a noneditable Combobox be allowed to return to unselected mode by the user?
 - since all events are dispatched without blocking uitask, don't bother requiring explicit dispatch? remove ui.Event() and make Window.Closing initialized by default; if we don't listen on the channel, nothing will happen