diff --git a/lib/classes/subscription.rb b/lib/classes/subscription.rb
index 9860e5a08..7994bfe48 100644
--- a/lib/classes/subscription.rb
+++ b/lib/classes/subscription.rb
@@ -1,3 +1,4 @@
+require "commontator"
 module Commontator
   class Subscription < ActiveRecord::Base
     belongs_to :subscriber, :polymorphic => true
diff --git a/lib/classes/thread.rb b/lib/classes/thread.rb
index a3eb38fdb..93f0f657a 100644
--- a/lib/classes/thread.rb
+++ b/lib/classes/thread.rb
@@ -1,3 +1,4 @@
+require "commontator"
 class Commontator::Thread < ActiveRecord::Base
   belongs_to :closer, polymorphic: true, optional: true
   belongs_to :commontable, polymorphic: true, optional: true, inverse_of: :commontator_thread