diff --git a/server/wsproxy/constant.h b/server/wsproxy/constant.h
index bd6c99a..f30f340 100644
--- a/server/wsproxy/constant.h
+++ b/server/wsproxy/constant.h
@@ -26,7 +26,7 @@ enum InnerMesssage_e
 enum IoContext_e
 {
    IC_Master,
-   IC_Upstream,
+   IC_UpStream,
    IC_Max
 };
 
diff --git a/server/wsproxy/upstream.cc b/server/wsproxy/upstream.cc
index 74108f5..caccc08 100644
--- a/server/wsproxy/upstream.cc
+++ b/server/wsproxy/upstream.cc
@@ -34,7 +34,7 @@ void UpStream::Init(int instance_id, const std::string& remote_ip, int remote_po
     last_pong_tick = a8::XGetTickCount();
     recv_buff_ = (char*) malloc(PACK_MAX * 2);
 #ifdef USE_ASIO
-    auto io_context = IoMgr::Instance()->GetIoContext(IC_Master);
+    auto io_context = IoMgr::Instance()->GetIoContext(IC_UpStream);
     if (!io_context) {
         abort();
     }