diff --git a/wchat/wx/Recharge.php b/wchat/wx/Recharge.php
index d7a1221..70eac54 100644
--- a/wchat/wx/Recharge.php
+++ b/wchat/wx/Recharge.php
@@ -118,7 +118,7 @@ class Recharge extends SmallProgram
 		$data['sign'] = Help::sign($data, $key, $sign_type);
 		$data['sign_type'] = $this->config->getSignType();
 
-		return Help::toXml($this->data);
+		return Help::toXml($data);
 	}
 
 	public function getSignData()