diff --git a/TODO b/TODO
index 9702011d..2b3278d0 100644
--- a/TODO
+++ b/TODO
@@ -6,3 +6,4 @@
   <?php echo "<?php exit(); ?>"; ?>
 * think about passing default structures to includes, i.e. {include
   default=$foo}, then using $bar in included template, instead of $foo.bar
+* support implementations of prefiltes, mods, and others as class methods.