diff --git a/addons/crm/models/crm_lead.py b/addons/crm/models/crm_lead.py
index 7866ce4aa979ea6c9dacbdf334af9316bc61d346..a5ff42b0604dfd5cef471879e4cccfd09bb05a7c 100644
--- a/addons/crm/models/crm_lead.py
+++ b/addons/crm/models/crm_lead.py
@@ -219,7 +219,7 @@ class Lead(models.Model):
         others = self - leads
         others.day_open = None
         for lead in leads:
-            date_create = fields.Datetime.from_string(lead.create_date)
+            date_create = fields.Datetime.from_string(lead.create_date).replace(microsecond=0)
             date_open = fields.Datetime.from_string(lead.date_open)
             lead.day_open = abs((date_open - date_create).days)