diff --git a/woob/capabilities/bank/transfer.py b/woob/capabilities/bank/transfer.py
index 53624b354ece940575edc1787cd8bc31cfd04d2f..612497946c48ac95d63889868ee7ac9940a36b01 100644
--- a/woob/capabilities/bank/transfer.py
+++ b/woob/capabilities/bank/transfer.py
@@ -339,6 +339,7 @@ class CapTransfer(Capability):
 
     accepted_beneficiary_types = (BeneficiaryType.RECIPIENT, )
     accepted_execution_date_types = (TransferDateType.FIRST_OPEN_DAY, TransferDateType.DEFERRED)
+    accepted_execution_frequencies = set(TransferFrequency) - set([TransferFrequency.UNKNOWN])
 
     def iter_transfer_recipients(self, account):
         """