diff --git a/addons/l10n_ch/models/res_bank.py b/addons/l10n_ch/models/res_bank.py
index 7a60d7f0eae..0ddc98172a3 100644
--- a/addons/l10n_ch/models/res_bank.py
+++ b/addons/l10n_ch/models/res_bank.py
@@ -44,10 +44,9 @@ class ResPartnerBank(models.Model):
     @api.depends('acc_number')
     def _compute_l10n_ch_postal(self):
         for record in self:
-            if record.acc_type == 'postal':
-                record.l10n_ch_postal = record.sanitized_acc_number
-            elif record.acc_type == 'iban':
+            if record.acc_type == 'iban':
                 record.l10n_ch_postal = record._retrieve_l10n_ch_postal(record.sanitized_acc_number)
+            record.l10n_ch_postal = record.sanitized_acc_number
 
     def _retrieve_l10n_ch_postal(self, iban):
         """ Reads a swiss postal account number from a an IBAN and returns it as