diff --git a/qq/Recharge.php b/qq/Recharge.php
index f59674a..6a8457a 100644
--- a/qq/Recharge.php
+++ b/qq/Recharge.php
@@ -62,7 +62,7 @@ class Recharge extends SmallProgram
 				$return['message'] = '返回数据签名验证失败';
 			} else if ($sign != $_sign) {
 				$return['code'] = -1;
-				$return['message'] = $data['retmsg'] ?? '预支付系统错误!';
+				$return['message'] = '预支付系统数据签名验证失败!';
 			} else {
 				$return['code'] = 0;
 				$return['data'] = $data;