diff --git a/addons/account/models/account_account.py b/addons/account/models/account_account.py
index e722472bbe5..a6f7dcbe785 100644
--- a/addons/account/models/account_account.py
+++ b/addons/account/models/account_account.py
@@ -284,10 +284,12 @@ class AccountAccount(models.Model):
             account.is_off_balance = account.internal_group == "off_balance"
 
     def _set_opening_debit(self):
-        self._set_opening_debit_credit(self.opening_debit, 'debit')
+        for record in self:
+            record._set_opening_debit_credit(record.opening_debit, 'debit')
 
     def _set_opening_credit(self):
-        self._set_opening_debit_credit(self.opening_credit, 'credit')
+        for record in self:
+            record._set_opening_debit_credit(record.opening_credit, 'credit')
 
     def _set_opening_debit_credit(self, amount, field):
         """ Generic function called by both opening_debit and opening_credit's