diff --git a/docs/impl/reports/TIME-SYNC.md b/docs/impl/reports/TIME-SYNC.md
index a809ad7..cbadda9 100644
--- a/docs/impl/reports/TIME-SYNC.md
+++ b/docs/impl/reports/TIME-SYNC.md
@@ -31,7 +31,7 @@ an RTC backup battery (see [BOM](../../BOM.md#rtc-backup-battery)). `rtc1` (`teg
 sudo timedatectl set-timezone Asia/Tokyo
 ```
 
-`/etc/systemd/timesyncd.conf.d/10-servers.conf`:
+`/etc/systemd/timesyncd.conf.d/10-servers.conf` (superseded on 2026-10-09 by chrony, below; timesyncd is no longer installed):
 
 ```
 # Japan-local primary (NICT, national time standard), global pool as backup.