diff --git a/piker/brokers/binance/feed.py b/piker/brokers/binance/feed.py
index 02f4c77a..b1dcda85 100644
--- a/piker/brokers/binance/feed.py
+++ b/piker/brokers/binance/feed.py
@@ -275,12 +275,14 @@ async def open_history_client(
                     f'{times}'
                 )
 
+            # XXX, debug any case where the latest 1m bar we get is
+            # already another "sample's-step-old"..
             if end_dt is None:
                 inow: int = round(time.time())
                 if (
-                    (inow - times[-1])
+                    _time_step := (inow - times[-1])
                     >
-                    timeframe
+                    timeframe * 2
                 ):
                     await tractor.pause()