diff --git a/base_login_date_improvement/__openerp__.py b/base_login_date_improvement/__openerp__.py
index d9b637750..860264bd0 100644
--- a/base_login_date_improvement/__openerp__.py
+++ b/base_login_date_improvement/__openerp__.py
@@ -32,7 +32,8 @@ This creates a new table and a function field to avoid this.
 """,
  "website": "http://camptocamp.com",
  "depends": ['base'],
- "data": [],
+ "data": ['security/ir.model.access.csv',
+          ],
  "auto_install": False,
  "installable": True
  }
diff --git a/base_login_date_improvement/res_users.py b/base_login_date_improvement/res_users.py
index 08117fada..393017270 100644
--- a/base_login_date_improvement/res_users.py
+++ b/base_login_date_improvement/res_users.py
@@ -61,7 +61,8 @@ class ResUsers(orm.Model):
         'login_date': fields.function(_get_login_date,
                                       string='Latest connection',
                                       type='date', select=1,
-                                      readonly=True, store=False),
+                                      readonly=True, store=False,
+                                      nodrop=True),
     }
 
     # Re-defining the login function in order to use the new table