diff --git a/tools/maillist_admin.py b/tools/maillist_admin.py
index 2e6940f..f1973cd 100644
--- a/tools/maillist_admin.py
+++ b/tools/maillist_admin.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 # TODO list all mailing list accounts
 #   - if `backend` is `bk_none`, list all accounts under mlmmj spool directory.
 #   - if `backend` is not `bk_none`, query from backend.