diff --git a/src/main/java/com/chaozhanggui/system/cashierservice/dao/TbProductSkuMapper.java b/src/main/java/com/chaozhanggui/system/cashierservice/dao/TbProductSkuMapper.java
index 27462d3..ec667d6 100644
--- a/src/main/java/com/chaozhanggui/system/cashierservice/dao/TbProductSkuMapper.java
+++ b/src/main/java/com/chaozhanggui/system/cashierservice/dao/TbProductSkuMapper.java
@@ -44,6 +44,6 @@ public interface TbProductSkuMapper {
     @Update("update tb_product_sku set stock_number=stock_number+#{num} WHERE id=#{id}")
     int incrStock(String skuId, int addNum);
 
-    @Update("update tb_product set stock_number=stock_number-#{num} WHERE id=#{id} and stock_number-#{num} > 0")
+    @Update("update tb_product_sku set stock_number=stock_number-#{num} WHERE id=#{id} and stock_number-#{num} > 0")
     int decrStock(String id, int num);
 }