diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index e3ba5b9..48de5a1 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -16,7 +16,7 @@
         # SIM_ORDER_ENTRY_REST_PORT=28082
         # SIM_ACCOUNTING_REST_PORT=28083
         # SIM_HOST=rt_simulator  # for **docker compose** service rt_simulator
-        "exchange_id": "__SIM-PLACEHOLDER__"
+        "exchange_id": "__SIM-EXCHANGEPLACEHOLDER__"
         "mktdata" : {
             # 
             "class":  "cvttpy_trading.exchanges.mkt_simulator.md_client.DisabledRtSimulatorMdFeed"