diff --git a/app/tasks/maintenance/add_dossiers_missing_champs_task.rb b/app/tasks/maintenance/add_dossiers_missing_champs_task.rb
index 7ffe905a5..33a6aeff2 100644
--- a/app/tasks/maintenance/add_dossiers_missing_champs_task.rb
+++ b/app/tasks/maintenance/add_dossiers_missing_champs_task.rb
@@ -5,7 +5,7 @@ module Maintenance
     csv_collection
 
     def process(row)
-      DataFixer::DossierChampsMissing(dossier: row["dossier_id"]).fix
+      DataFixer::DossierChampsMissing.new(dossier: row["dossier_id"]).fix
     end
   end
 end