diff --git a/Classes/JcWallet.cpp b/Classes/JcWallet.cpp
index fb6cafb..cd7d203 100644
--- a/Classes/JcWallet.cpp
+++ b/Classes/JcWallet.cpp
@@ -151,8 +151,9 @@ NS_CC_BEGIN
         JSMethodParam *data = new JSMethodParam();
         std::string methodNameStr(methodName);
         data->methodName = methodNameStr;
-        data -> funId = uuid_v4();
-
+        char uuidv4[38];
+        uuid_v4(uuidv4);
+        data -> funId.assign(uuidv4);
         data->paramCount = paramCount;
         for (int i = 0; i < paramCount; i++) {
             char *arg = *(paramList + i);