diff --git a/Day5/router/ProductRouter.js b/Day5/router/ProductRouter.js
index 0257028..93ae38e 100644
--- a/Day5/router/ProductRouter.js
+++ b/Day5/router/ProductRouter.js
@@ -24,7 +24,7 @@ const getAllProductHandler = async function (req,res){
             if(order=="inc"){
                 queryResProm = queryResProm.sort(sortParam); 
             }else{
-                queryResProm = queryResProm.sort(-sortParam);
+                queryResProm = queryResProm.sort("-"+sortParam);
             }
         }
         if(selectQuery){