diff --git a/app/components/dossiers/individual_form_component/individual_form_component.html.haml b/app/components/dossiers/individual_form_component/individual_form_component.html.haml
index 97b91976c..38a5b2b19 100644
--- a/app/components/dossiers/individual_form_component/individual_form_component.html.haml
+++ b/app/components/dossiers/individual_form_component/individual_form_component.html.haml
@@ -1,4 +1,5 @@
 = form_for @dossier, url: update_identite_dossier_path(@dossier), html: { id: 'identite-form', class: "form",  "data-controller" => "for-tiers" } do |f|
+  = f.hidden_field :for_tiers
   - if for_tiers?
     .fr-alert.fr-alert--info.fr-mb-2w
       %p.fr-notice__text
diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index 08ecd2f55..c80792af4 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -139,7 +139,7 @@ module Users
       respond_to do |format|
         format.html
         format.turbo_stream do
-          @dossier.update_columns(params.require(:dossier).permit(:for_tiers).to_h)
+          @dossier.for_tiers = params[:dossier][:for_tiers]
         end
       end
     end