diff --git a/components/CouponsPopup.vue b/components/CouponsPopup.vue
index cb2eaf6..2c7adf5 100644
--- a/components/CouponsPopup.vue
+++ b/components/CouponsPopup.vue
@@ -148,7 +148,7 @@ export default {
       return this.twoList['unusable'].length
     },
     computePrice() {
-      return this.force2Decimal(this.currentPrice - this.selectItem.couponPrice)
+      return this.force2Decimal(this.currentPrice - this.selectItem.couponPrice) || this.currentPrice
     },
     maxIndex() {
       const maxIndex = this.list.reduce((a, b, c) => {