diff --git a/app/controllers/manager/procedures_controller.rb b/app/controllers/manager/procedures_controller.rb
index 33843a6c1..ec45022a9 100644
--- a/app/controllers/manager/procedures_controller.rb
+++ b/app/controllers/manager/procedures_controller.rb
@@ -40,8 +40,8 @@ module Manager
     end
 
     def export_mail_brouillons
-      dossiers = procedure.dossiers.state_brouillon
-      emails = dossiers.map { |d| d.user.email }.sort
+      dossiers = procedure.dossiers.state_brouillon.includes(:user)
+      emails = dossiers.map { |d| d.user.email }.sort.uniq
       date = Time.zone.now.strftime('%d-%m-%Y')
       send_data(emails.join("\n"), :filename => "brouillons-#{procedure.id}-au-#{date}.csv")
     end