diff --git a/bricks/bricks.js b/bricks/bricks.js
index 6a852ca..b4bf427 100644
--- a/bricks/bricks.js
+++ b/bricks/bricks.js
@@ -404,7 +404,7 @@ var _add_event_data = function(params, event_data, rtdata, params_mapping){
 
 }
 
-_buildDataHandler = async function(obj, from_widget, target, options, desc){
+_buildDataHandler = async function(from_widget, target, options, desc){
 	var jc = new bricks.HttpJson();
 	var method = options.method || 'GET';
 	if (options.params instanceof FormData) {