diff --git a/api-server/product_catalog.js b/api-server/product_catalog.js
index 07a922a..029b388 100644
--- a/api-server/product_catalog.js
+++ b/api-server/product_catalog.js
@@ -17,8 +17,8 @@ module.exports = function product_catalog( options ) {
 
         if( product ) {
           product.star = Math.max(0,(
-            (product.star||0) +
-              ((args.star||true) ? +1 : -1 )))
+            (product.star || 0) +
+              ((args.star && true) ? +1 : -1 )))
 
           product.save$(function(err,product){
             if(err) return done(err);