diff --git a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.h b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.h
index 54dbd91b85f9a27c5a89abbcfae32cd7db06231d..077e90ba4437c9969fec8895d6abf57d76b46df2 100644
--- a/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.h
+++ b/interfaces/kits/js/src/mod_fs/class_watcher/watcher_n_exporter.h
@@ -44,7 +44,7 @@ public:
     static napi_value Constructor(napi_env env, napi_callback_info info);
     static napi_value Start(napi_env env, napi_callback_info info);
     static napi_value Stop(napi_env env, napi_callback_info info);
-    static void WatcherCallback(napi_env env, NRef & callback, const std::string &fileName, const uint32_t &event,
+    static void WatcherCallback(napi_env env, NRef &callback, const std::string &fileName, const uint32_t &event,
                                 const uint32_t &cookie);
 
     WatcherNExporter(napi_env env, napi_value exports);