diff --git a/vnpy/gateway/hbdm/hbdm_gateway.py b/vnpy/gateway/hbdm/hbdm_gateway.py
index ea754267..5a822659 100644
--- a/vnpy/gateway/hbdm/hbdm_gateway.py
+++ b/vnpy/gateway/hbdm/hbdm_gateway.py
@@ -9,6 +9,7 @@ import json
 import zlib
 import hashlib
 import hmac
+import sys
 from copy import copy
 from datetime import datetime
 from threading import Lock
diff --git a/vnpy/gateway/huobi/huobi_gateway.py b/vnpy/gateway/huobi/huobi_gateway.py
index e66ce614..08c18e05 100644
--- a/vnpy/gateway/huobi/huobi_gateway.py
+++ b/vnpy/gateway/huobi/huobi_gateway.py
@@ -9,6 +9,7 @@ import json
 import zlib
 import hashlib
 import hmac
+import sys
 from copy import copy
 from datetime import datetime