diff --git a/odoo/addons/base/res/res_users.py b/odoo/addons/base/res/res_users.py
index 866ab65ec85..8c7194d4279 100644
--- a/odoo/addons/base/res/res_users.py
+++ b/odoo/addons/base/res/res_users.py
@@ -444,6 +444,8 @@ class Users(models.Model):
     @api.model
     def check_credentials(self, password):
         """ Override this method to plug additional authentication methods"""
+        if not password:
+            raise AccessDenied()
         user = self.sudo().search([('id', '=', self._uid), ('password', '=', password)])
         if not user:
             raise AccessDenied()