diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index c4cf301..e89a355 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -412,6 +412,7 @@
                             , "contract_expiry_type": "EXPIRING"
                             # , "contract_expiry_type": "PERPETUAL" # "PERPETUAL" #
                             , "expiring_contract_status": "STATUS_UNEXPIRED"
+                            , "futures_underlying_type": 
                         }
                     }
                 }