diff --git a/etc/TODO b/etc/TODO
index 2ebbc464434..71d8071cfca 100644
--- a/etc/TODO
+++ b/etc/TODO
@@ -110,6 +110,8 @@ where <device> is the network device found under the first key.
 ** Check for any included packages that define obsolete bug-reporting commands.
 Change them to use report-emacs-bug.
 
+** Allow fringe indicators to display a tooltip (provide a help-echo property?)
+
 * Important features:
 
 ** Provide user-friendly ways to list all available font families,