diff --git a/TODO b/TODO
index 9e4e07da5e..d8e13e5e61 100644
--- a/TODO
+++ b/TODO
@@ -23,6 +23,9 @@ Janitorial Clean-ups:
 
 Features:
 
+* maybe add a seccomp-based high-level filter that blocks creation of suid/sgid
+  files.
+
 * make MAINPID= message reception checks even stricter: if service uses User=,
   then check sending UID and ignore message if it doesn't match the user or
   root.