diff --git a/app/models/generic/person.rb b/app/models/generic/person.rb
index 326a531..2cee580 100644
--- a/app/models/generic/person.rb
+++ b/app/models/generic/person.rb
@@ -9,7 +9,7 @@ module Generic::Person
   extend ActiveSupport::Concern
 
   included do
-    Person::PUBLIC_ATTRS += [:title, :correspondence_language, :additional_languages, :advertising]
+    Person::PUBLIC_ATTRS << :title << :correspondence_language << :additional_languages << :advertising
 
     CORRESPONDENCE_LANGUAGES = %w(de fr it en).freeze
     ADVERTISINGS = %w(none by_members by_anyone).freeze