diff --git a/vnpy/gateway/ctp/ctp_gateway.py b/vnpy/gateway/ctp/ctp_gateway.py
index 6512c41e..50f43152 100644
--- a/vnpy/gateway/ctp/ctp_gateway.py
+++ b/vnpy/gateway/ctp/ctp_gateway.py
@@ -233,7 +233,7 @@ class CtpMdApi(MdApi):
         
         self.userid = ""
         self.password = ""
-        self.brokerid = 0
+        self.brokerid = ""
     
     def onFrontConnected(self):
         """
@@ -378,7 +378,7 @@ class CtpTdApi(TdApi):
         
         self.userid = ""
         self.password = ""
-        self.brokerid = 0
+        self.brokerid = ""
         self.auth_code = ""
         self.appid = ""
         self.product_info = ""
diff --git a/vnpy/gateway/ctptest/ctptest_gateway.py b/vnpy/gateway/ctptest/ctptest_gateway.py
index ad3dd73f..992829fa 100644
--- a/vnpy/gateway/ctptest/ctptest_gateway.py
+++ b/vnpy/gateway/ctptest/ctptest_gateway.py
@@ -233,7 +233,7 @@ class CtpMdApi(MdApi):
         
         self.userid = ""
         self.password = ""
-        self.brokerid = 0
+        self.brokerid = ""
     
     def onFrontConnected(self):
         """
@@ -377,7 +377,7 @@ class CtpTdApi(TdApi):
         
         self.userid = ""
         self.password = ""
-        self.brokerid = 0
+        self.brokerid = ""
         self.auth_code = ""
         self.appid = ""
         self.product_info = ""