diff --git a/templates/script/backup-all-buckets.erb.sh b/templates/script/backup-all-buckets.erb.sh
index 96ccd29..853b772 100644
--- a/templates/script/backup-all-buckets.erb.sh
+++ b/templates/script/backup-all-buckets.erb.sh
@@ -50,7 +50,7 @@ function do_backup {
     rclone mount ${project}:${bucket} ${mountpoint}/ --daemon --allow-other --dir-cache-time 24h
     rclone mkdir ${mirror}:${mirrorbucket}
     duplicity --full-if-older-than 1M --asynchronous-upload --tempdir /mnt --archive-dir /mnt --no-encryption ${mountpoint} rclone://${mirror}:/${mirrorbucket}
-    if [[ "${extra_backup_jobs[${customer}]:+none}" != "none" ]]  && [[ -f "${extra_backup_jobs[${customer}]}" ]]; then
+    if [[ "${extra_backup_jobs[${customer}]:+found}" == "found" ]]  && [[ -f "${extra_backup_jobs[${customer}]}" ]]; then
       ${extra_backup_jobs[${customer}]}
     fi
     umount ${mountpoint}