diff --git a/src/TODO b/src/TODO
index 09c6c17e7..e0a30e5fa 100644
--- a/src/TODO
+++ b/src/TODO
@@ -1 +1,2 @@
 - Support for new, OpenType 1.6, mark filtering sets
+- When sanitizing, have to do a second round to make sure no toe-stepping