diff --git a/alpaca/broker/models/journals.py b/alpaca/broker/models/journals.py
index c04563c8..f6da09cd 100644
--- a/alpaca/broker/models/journals.py
+++ b/alpaca/broker/models/journals.py
@@ -57,7 +57,7 @@ class Journal(ModelWithID):
     transmitter_address: Optional[str] = None
     transmitter_financial_institution: Optional[str] = None
     transmitter_timestamp: Optional[str] = None
-    currency: SupportedCurrencies
+    currency: Optional[SupportedCurrencies] = None
 
 
 class BatchJournalResponse(Journal):