diff --git a/modules/bforbank/module.py b/modules/bforbank/module.py
index 89cd7f50..03ca0512 100644
--- a/modules/bforbank/module.py
+++ b/modules/bforbank/module.py
@@ -21,7 +21,7 @@
 from weboob.tools.backend import Module, BackendConfig
 from weboob.capabilities.bank import CapBank, AccountNotFound
 from weboob.capabilities.base import find_object
-from weboob.tools.value import ValueBackendPassword
+from weboob.tools.value import ValueBackendPassword, Value
 from .browser import BforbankBrowser
 
 
@@ -37,7 +37,7 @@ class BforbankModule(Module, CapBank):
     VERSION = '1.1'
     CONFIG = BackendConfig(ValueBackendPassword('login',    label='Identifiant', masked=False),
                            ValueBackendPassword('password', label='Code personnel'),
-                           ValueBackendPassword('birthdate', label='Date de naissance'),
+                           Value('birthdate', label='Date de naissance', regexp='^(\d{2}[/-]?\d{2}[/-]?\d{4}|)$')
                            )
 
     BROWSER = BforbankBrowser
diff --git a/modules/bforbank/pages.py b/modules/bforbank/pages.py
index 2a34bd63..b7664f20 100644
--- a/modules/bforbank/pages.py
+++ b/modules/bforbank/pages.py
@@ -106,7 +106,7 @@ class AccountsPage(LoggedPage, HTMLPage):
                 balance = re.sub(r'[^\d\-\,]', '', balance)
                 return Decimal(re.sub(r',(?!(\d+$))', '', balance).replace(',', '.'))
 
-            obj_id = CleanText('./td/div/div[3]/span')
+            obj_id = CleanText('./td/div/div[3]/span') & Regexp(pattern=r'(\d+)')
             obj_label = CleanText('./td/div/div[2]/span')
             obj_currency = FrenchTransaction.Currency('./td/div/div[1]/div/span')
             obj_type = Map(Regexp(Field('label'), r'^(\w+)'), TYPE, default=Account.TYPE_UNKNOWN)