diff --git a/app/migrator/backup.go b/app/migrator/backup.go
index 59d2226f..e96058ac 100644
--- a/app/migrator/backup.go
+++ b/app/migrator/backup.go
@@ -26,6 +26,7 @@ type AutoBackup struct {
 func (ab AutoBackup) Do() {
 	log.Printf("[INFO] activate auto-backup for %s", ab.BackupLocation)
 	tick := time.NewTicker(24 * ab.Duration)
+	log.Printf("[DEBUG] first backup at %s", time.Now().Add(ab.Duration))
 	for range tick.C {
 		if _, err := ab.makeBackup(); err != nil {
 			log.Printf("[WARN] auto-backup for %s failed, %s", ab.SiteID, err)