diff --git a/server/WebApi.cpp b/server/WebApi.cpp
index 4b18a276..14b654c3 100755
--- a/server/WebApi.cpp
+++ b/server/WebApi.cpp
@@ -1219,7 +1219,7 @@ void installWebApi() {
           // 兼容老版本请求，新版本去除enable_tcp参数并新增tcp_mode参数
           tcp_mode = 1;
       }
-      auto local_ip = "::";
+      std::string local_ip = "::";
       if (!allArgs["local_ip"].empty()) {
           local_ip = allArgs["local_ip"];
       }