diff --git a/app/models/product.rb b/app/models/product.rb
index 4e2cdf0..2f393ef 100644
--- a/app/models/product.rb
+++ b/app/models/product.rb
@@ -104,7 +104,7 @@ class Product < ActiveRecord::Base
   end
 
   def price_with_discount
-    price - discount if discount
+    discount ? price - discount : price
   end
 
   def price=(value)
--
libgit2 0.21.2