diff --git a/migrations/nixos-mailserver-migration-03.py b/migrations/nixos-mailserver-migration-03.py
index 3bf782a..2347bd5 100644
--- a/migrations/nixos-mailserver-migration-03.py
+++ b/migrations/nixos-mailserver-migration-03.py
@@ -40,7 +40,7 @@ def check_user(vmail_root: Path):
 def is_maildir_related(path: Path, layout: FolderLayout) -> bool:
     if not path.is_dir():
         return False
-    if path.name in ["cur", "new", "tmp"]:
+    if path.name in ["cur", "new", "tmp", "subscriptions"]:
         return True
     if layout is FolderLayout.Default and path.name.startswith("."):
         return True