diff --git a/piker/brokers/ib/broker.py b/piker/brokers/ib/broker.py
index 11f43a6f..3638d6d6 100644
--- a/piker/brokers/ib/broker.py
+++ b/piker/brokers/ib/broker.py
@@ -64,7 +64,8 @@ from piker.clearing._messages import (
 from piker.data._source import Symbol
 from .api import (
     _accounts2clients,
-    _adhoc_futes_set,
+    # _adhoc_futes_set,
+    _adhoc_symbol_map,
     log,
     get_config,
     open_client_proxies,
@@ -87,15 +88,23 @@ def pack_position(
         # TODO: lookup fqsn even for derivs.
         symbol = con.symbol.lower()
 
+    # try our best to figure out the exchange / venue
     exch = (con.primaryExchange or con.exchange).lower()
-    fqsn = '.'.join((symbol, exch))
     if not exch:
-        # attempt to lookup the symbol from our
-        # hacked set..
-        for sym in _adhoc_futes_set:
-            if symbol in sym:
-                fqsn = sym
-                break
+        # for wtv cucked reason some futes don't show their
+        # exchange (like CL.NYMEX) ...
+        entry = _adhoc_symbol_map.get(
+            con.symbol or con.localSymbol
+        )
+        if entry:
+            meta, kwargs = entry
+            cid = meta.get('conId')
+            if cid:
+                assert con.conId == meta['conId']
+            exch = meta['exchange']
+
+    assert exch, f'No clue:\n {con}'
+    fqsn = '.'.join((symbol, exch))
 
     expiry = con.lastTradeDateOrContractMonth
     if expiry: