diff --git a/bot.py b/bot.py
index eeeee10..689f712 100755
--- a/bot.py
+++ b/bot.py
@@ -13,7 +13,7 @@ def auth(bot, update):
  bot.sendMessage(chat_id=update.message.chat_id, text="Ooops. Not implemented yet.")
 
 def unauth(bot, update):
- dbtools.deleteUser(update.message.chat_id)
+ dbtools.dbHelper().deleteUser(update.message.chat_id)
  bot.sendMessage(chat_id=update.message.chat_id, text=strings.unauth % setuptools.url())
 
 updater.dispatcher.add_handler(telegram.ext.CommandHandler("start", start))