diff --git a/partner_contact_birthdate/models.py b/partner_contact_birthdate/models.py
index 6342228b5..2686fed6d 100644
--- a/partner_contact_birthdate/models.py
+++ b/partner_contact_birthdate/models.py
@@ -32,18 +32,18 @@ class Partner(models.Model):
 
     # Make the old Char field to reflect the new Date field
     birthdate = fields.Char(
-        compute="_compute_birthdate",
-        inverse="_inverse_birthdate",
+        compute="_birthdate_compute",
+        inverse="_birthdate_inverse",
         store=True)
 
     @api.one
     @api.depends("birthdate_date")
-    def _compute_birthdate(self):
+    def _birthdate_compute(self):
         """Store a string of the new date in the old field."""
         self.birthdate = self.birthdate_date
 
     @api.one
-    def _inverse_birthdate(self):
+    def _birthdate_inverse(self):
         """Convert the old Char date to the new Date format."""
         try:
             self.birthdate_date = self.birthdate
@@ -53,6 +53,6 @@ class Partner(models.Model):
                   "res.partner {0.id} ({0.name}). Skipping.").format(self))
 
     @api.model
-    def _install_birthdate_date(self):
+    def _birthdate_install(self):
         """Export all old birthdates to the new format."""
         self.search([('birthdate', "!=", False)])._inverse_birthdate()