diff --git a/ruby/lib/gilded_rose.rb b/ruby/lib/gilded_rose.rb
index dae32158..2046548a 100644
--- a/ruby/lib/gilded_rose.rb
+++ b/ruby/lib/gilded_rose.rb
@@ -37,7 +37,7 @@ class GildedRose
           if !item.name.downcase.match /backstage/
             if item.quality > 0
               if !sulfuras?(item)
-                item.quality = item.quality - 1
+                update_normal_quality(item)
               end
             end
           else