diff --git a/api/controllers/wxapp/liche/Pay.php b/api/controllers/wxapp/liche/Pay.php
index 753ce0b7..b2ce8d91 100644
--- a/api/controllers/wxapp/liche/Pay.php
+++ b/api/controllers/wxapp/liche/Pay.php
@@ -57,7 +57,7 @@ class Pay extends Wxapp{
                 if($need_pay<=0){
                     throw new Exception('订单已支付完成无需支付'.$need_pay, API_CODE_FAIL);
                 }
-                if($price<self::MIN_PRICE){
+                if($price && $price<self::MIN_PRICE){
                     throw new Exception('单笔金额不得低于'.self::MIN_PRICE, API_CODE_FAIL);
                 }
                 if($price>$need_pay){