diff --git a/ruby/gilded_rose.rb b/ruby/gilded_rose.rb
index e6bc3c4b..66102019 100644
--- a/ruby/gilded_rose.rb
+++ b/ruby/gilded_rose.rb
@@ -8,12 +8,16 @@ class GildedRose
     item.name != "Sulfuras, Hand of Ragnaros"
   end
 
+  def decrease_quality(item)
+    item.quality = item.quality - 1
+  end
+
   def update_quality()
     @items.each do |item|
       if item.name != "Aged Brie" and item.name != "Backstage passes to a TAFKAL80ETC concert"
         if item.quality > 0
           if not_legendary?(item)
-            item.quality = item.quality - 1
+            decrease_quality(item)
           end
         end
       else
@@ -41,7 +45,7 @@ class GildedRose
           if item.name != "Backstage passes to a TAFKAL80ETC concert"
             if item.quality > 0
               if not_legendary?(item)
-                item.quality = item.quality - 1
+                decrease_quality(item)
               end
             end
           else