diff --git a/piker/brokers/ib/venues.py b/piker/brokers/ib/venues.py
index cd2dc7b1..a24635bd 100644
--- a/piker/brokers/ib/venues.py
+++ b/piker/brokers/ib/venues.py
@@ -43,6 +43,7 @@ from pendulum import (
 if TYPE_CHECKING:
     from ib_async import (
         TradingSession,
+        Contract,
         ContractDetails,
     )
     from exchange_calendars.exchange_calendars import (
@@ -82,7 +83,12 @@ def has_holiday(
 
     '''
     tz: str = con_deats.timeZoneId
-    exch: str = con_deats.contract.primaryExchange
+    con: Contract = con_deats.contract
+    exch: str = (
+        con.primaryExchange
+        or
+        con.exchange
+    )
 
     # XXX, ad-hoc handle any IB exchange which are non-std
     # via lookup table..