diff --git a/TODO b/TODO
index 526926f862..0c648f9931 100644
--- a/TODO
+++ b/TODO
@@ -274,6 +274,7 @@ Features:
 
 * sd-event
   - allow multiple signal handlers per signal?
+  - document chaining of signal handler for SIGCHLD and child handlers
 
 * in the final killing spree, detect processes from the root directory, and
   complain loudly if they have argv[0][0] == '@' set.