diff --git a/addons/auth_signup/models/res_partner.py b/addons/auth_signup/models/res_partner.py
index 6dbf14188d8..a1d9f7d3ec5 100644
--- a/addons/auth_signup/models/res_partner.py
+++ b/addons/auth_signup/models/res_partner.py
@@ -33,6 +33,7 @@ class ResPartner(models.Model):
     signup_url = fields.Char(compute='_compute_signup_url', string='Signup URL')
 
     @api.multi
+    @api.depends('signup_token', 'signup_expiration')
     def _compute_signup_valid(self):
         dt = now()
         for partner in self:
diff --git a/addons/stock/models/stock_move.py b/addons/stock/models/stock_move.py
index 494c6ead071..9373997a0ce 100644
--- a/addons/stock/models/stock_move.py
+++ b/addons/stock/models/stock_move.py
@@ -288,10 +288,10 @@ class StockMove(models.Model):
                     if propagated_date_field:
                         current_date = datetime.strptime(move.date_expected, DEFAULT_SERVER_DATETIME_FORMAT)
                         new_date = datetime.strptime(vals.get(propagated_date_field), DEFAULT_SERVER_DATETIME_FORMAT)
-                        delta = relativedelta.relativedelta(new_date, current_date)
-                        if abs(delta.days) >= move.company_id.propagation_minimum_delta:
+                        delta_days = (new_date - current_date).total_seconds() / 86400
+                        if abs(delta_days) >= move.company_id.propagation_minimum_delta:
                             old_move_date = datetime.strptime(move.move_dest_id.date_expected, DEFAULT_SERVER_DATETIME_FORMAT)
-                            new_move_date = (old_move_date + relativedelta.relativedelta(days=delta.days or 0)).strftime(DEFAULT_SERVER_DATETIME_FORMAT)
+                            new_move_date = (old_move_date + relativedelta.relativedelta(days=delta_days or 0)).strftime(DEFAULT_SERVER_DATETIME_FORMAT)
                             propagated_changes_dict['date_expected'] = new_move_date
                     #For pushed moves as well as for pulled moves, propagate by recursive call of write().
                     #Note that, for pulled moves we intentionally don't propagate on the procurement.