diff --git a/app/components/editable_champ/siret_component/siret_component.html.haml b/app/components/editable_champ/siret_component/siret_component.html.haml
index 0bcdcdb47..1970d85cc 100644
--- a/app/components/editable_champ/siret_component/siret_component.html.haml
+++ b/app/components/editable_champ/siret_component/siret_component.html.haml
@@ -2,7 +2,7 @@
   id: @champ.input_id,
   aria: { describedby: @champ.describedby_id },
   placeholder: t(".placeholder"),
-  data: { controller: 'turbo-input', turbo_input_url_value: champs_siret_path(@champ.id) },
+  data: { controller: 'turbo-input', turbo_input_load_on_connect_value: @champ.prefilled? && @champ.value.present? && @champ.etablissement.blank?, turbo_input_url_value: champs_siret_path(@champ.id) },
   required: @champ.required?,
   pattern: "[0-9]{14}",
   title: t(".title"),
diff --git a/app/javascript/controllers/turbo_input_controller.tsx b/app/javascript/controllers/turbo_input_controller.tsx
index d194a7f3c..e2ad35db3 100644
--- a/app/javascript/controllers/turbo_input_controller.tsx
+++ b/app/javascript/controllers/turbo_input_controller.tsx
@@ -4,13 +4,18 @@ import { ApplicationController } from './application_controller';
 
 export class TurboInputController extends ApplicationController {
   static values = {
-    url: String
+    url: String,
+    loadOnConnect: { type: Boolean, default: false }
   };
 
   declare readonly urlValue: string;
+  declare readonly loadOnConnectValue: boolean;
 
   connect(): void {
     this.on('input', () => this.debounce(this.load, 200));
+    if (this.loadOnConnectValue) {
+      this.load();
+    }
   }
 
   private load(): void {
diff --git a/spec/models/concern/dossier_prefillable_concern_spec.rb b/spec/models/concern/dossier_prefillable_concern_spec.rb
index 3ab8f73e9..32a52cad8 100644
--- a/spec/models/concern/dossier_prefillable_concern_spec.rb
+++ b/spec/models/concern/dossier_prefillable_concern_spec.rb
@@ -6,7 +6,10 @@ RSpec.describe DossierPrefillableConcern do
     let(:dossier) { create(:dossier, :brouillon, procedure: procedure) }
     let(:types_de_champ_public) { [] }
 
-    subject(:fill) { dossier.prefill!(values); dossier.reload }
+    subject(:fill) do
+      dossier.prefill!(values)
+      dossier.reload
+    end
 
     shared_examples 'a dossier marked as prefilled' do
       it 'marks the dossier as prefilled' do