diff --git a/client/client.cpp b/client/client.cpp
index 225c20c..4da3f9c 100644
--- a/client/client.cpp
+++ b/client/client.cpp
@@ -824,7 +824,7 @@ std::string CClient::read_uuid()
     std::ifstream in_file(uuid_path.string(), std::ios::in);
     if (!in_file.is_open()) {
         TLOGE("Open File Failed {}", uuid_path.string());
-        return false;
+        return "";
     }
     std::string uuid;
     in_file >> uuid;