diff --git a/TODO b/TODO
index b4ee77722e..a7b32bd795 100644
--- a/TODO
+++ b/TODO
@@ -39,6 +39,10 @@ Features:
 
 * add bpf-based implementation of devices cgroup controller logic for compat with cgroupsv2 as supported by newest kernel
 
+* introduce sd_id128_get_boot_app_specific() which is like
+  sd_id128_get_machine_app_specific(). After all on long-running systems both
+  IDs have similar properties.
+
 * sd-bus: add vtable flag, that may be used to request client creds implicitly
   and asynchronously before dispatching the operation