diff --git a/server/wsproxy/app.cc b/server/wsproxy/app.cc
index db5adf4..c561686 100644
--- a/server/wsproxy/app.cc
+++ b/server/wsproxy/app.cc
@@ -86,8 +86,8 @@ static void SavePerfLog()
 bool App::Init(int argc, char* argv[])
 {
     signal(SIGPIPE, SIG_IGN);
-    this->argc = argc;
-    this->argv = argv;
+    this->argc_ = argc;
+    this->argv_ = argv;
 
     if (!ParseOpt()) {
         terminated = true;
@@ -486,7 +486,7 @@ void App::UnInitLog()
 bool App::ParseOpt()
 {
     int ch = 0;
-    while ((ch = getopt(argc, argv, "n:i:f:")) != -1) {
+    while ((ch = getopt(argc_, argv_, "n:i:f:")) != -1) {
         switch (ch) {
         case 'n':
             {
@@ -503,7 +503,7 @@ bool App::ParseOpt()
                 std::vector<std::string> strings;
                 a8::Split(optarg, strings, ',');
                 for (auto& str : strings) {
-                    flags.insert(a8::XValue(str).GetInt());
+                    flags_.insert(a8::XValue(str).GetInt());
                 }
             }
             break;
@@ -514,7 +514,7 @@ bool App::ParseOpt()
 
 bool App::HasFlag(int flag)
 {
-    return flags.find(flag) != flags.end();
+    return flags_.find(flag) != flags_.end();
 }
 
 void App::FreeSocketMsgQueue()
diff --git a/server/wsproxy/app.h b/server/wsproxy/app.h
index 37946d3..fc5c2db 100644
--- a/server/wsproxy/app.h
+++ b/server/wsproxy/app.h
@@ -63,16 +63,17 @@ private:
     void FreeUdpMsgQueue();
 
 public:
-    int argc = 0;
-    char** argv = nullptr;
     volatile bool terminated = false;
     volatile bool shutdowned = false;
-    std::set<int> flags;
     PerfMonitor perf;
 
 private:
+    int argc_ = 0;
+    char** argv_ = nullptr;
+
     int node_id_ = 0;
     int instance_id_ = 0;
+    std::set<int> flags_;
 
     std::shared_ptr<a8::uuid::SnowFlake> uuid_;
     std::mutex *loop_mutex_ = nullptr;