diff --git a/app/serializers/user_serializer.rb b/app/serializers/user_serializer.rb
index 73c3c00fea6ce6d946f23ec4abe8d64f237b960e..ff5cbb1f424a39b46c567f905f21a8d504f2246c 100644
--- a/app/serializers/user_serializer.rb
+++ b/app/serializers/user_serializer.rb
@@ -36,6 +36,10 @@ class UserSerializer < ActiveModel::Serializer
     object.learning_objects.where('state = ?', LearningObject.states[:published]).count
   end
 
+  def role_ids
+    object.roles.all.ids
+  end
+
   attributes \
       :id,
       :email,