diff --git a/app/models/page_context.rb b/app/models/page_context.rb
index 9d0d2b6..8ed4326 100644
--- a/app/models/page_context.rb
+++ b/app/models/page_context.rb
@@ -4,7 +4,11 @@ class PageContext
   include Mongoid::Document
   include Mongoid::Timestamps
   include OrbitModel::Impression
-  include AutoConvertUnitHelper
+  begin
+    include AutoConvertUnitHelper
+  rescue => e
+    puts "kernel is old!"
+  end
 
   field :update_user_id
   field :version, :type => Integer , :default => 0