diff --git a/webapp/controller/MarketController.class.php b/webapp/controller/MarketController.class.php
index 597a5e4d..d5362d1a 100644
--- a/webapp/controller/MarketController.class.php
+++ b/webapp/controller/MarketController.class.php
@@ -182,7 +182,7 @@ class MarketController extends BaseController {
         }
         $originalPrice = $goodsMeta['price'] * pow(10, CURRENCY_DECIMALS);
         $discountPrice = $goodsMeta['discount'] * 100 > 0 ?
-                       $originalPrice * $meta['discount'] : $originalPrice;
+                       $originalPrice * $goodsMeta['discount'] : $originalPrice;
         if (!$discountPrice || $price != $discountPrice) {
             myself()->_rspErr(500, 'price error');
             return;