diff --git a/TODO b/TODO
index 0905e82b04..4b75c8517d 100644
--- a/TODO
+++ b/TODO
@@ -544,6 +544,7 @@ External:
 * bootchart:
    - plot per-process IO utilization
    - group processes based on service association (cgroups)
+   - document initcall_debug
 
 Regularly: