diff --git a/TODO.md b/TODO.md
index ed429b415e715b6128ff3a64b7d204b03727e170..7dfd67f1911bd6c9a648b1692be34104d851283d 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,3 +1,5 @@
 # TODOS
 
 * Document [creating an EPUB](http://tex.stackexchange.com/questions/1551/use-latex-to-produce-epub)
+* Adapt the jQuery UI tooltip hack used for the overlib replacement with
+  tex4ht to upstream tex4ht.