diff --git a/app/models/learning_object.rb b/app/models/learning_object.rb
index f8d301243c221fa71db78147375e2f87ce6d9a10..66482698390b5336d4ebacad01cf18e63454dbf5 100644
--- a/app/models/learning_object.rb
+++ b/app/models/learning_object.rb
@@ -1,5 +1,7 @@
 class LearningObject < OrientDb::LearningObjectRepository
 
+  include ActiveModel::Model
+
   attr_accessor :id, :name, :title, :author_id, :description, :date, :exercises,
                 :references, :supplementary_material, :license_name, :license_uri,
                 :files