diff --git a/piker/brokers/deribit/api.py b/piker/brokers/deribit/api.py
index 1fd34554..f93a20e5 100644
--- a/piker/brokers/deribit/api.py
+++ b/piker/brokers/deribit/api.py
@@ -128,8 +128,9 @@ class Trade(Struct):
     index_price: float
     direction: str
     amount: float
-    combo_trade_id: Optional[int] = 0,
-    combo_id: Optional[str] = '',
+    combo_trade_id: Optional[int] = 0
+    combo_id: Optional[str] = ''
+    block_trade_id: str | None = ''
 
 
 class LastTradesResult(Struct):
diff --git a/piker/brokers/deribit/feed.py b/piker/brokers/deribit/feed.py
index 865d0e6f..7161aab5 100644
--- a/piker/brokers/deribit/feed.py
+++ b/piker/brokers/deribit/feed.py
@@ -46,9 +46,12 @@ from cryptofeed.defines import (
 from cryptofeed.symbols import Symbol
 
 from .api import (
-    Client, Trade,
+    Client,
+    Trade,
     get_config,
-    str_to_cb_sym, piker_sym_to_cb_sym, cb_sym_to_deribit_inst,
+    str_to_cb_sym,
+    piker_sym_to_cb_sym,
+    cb_sym_to_deribit_inst,
     maybe_open_price_feed
 )