diff --git a/src/Bundle/ChillPersonBundle/Controller/AccompanyingPeriodWorkDuplicateController.php b/src/Bundle/ChillPersonBundle/Controller/AccompanyingPeriodWorkDuplicateController.php
index 09b6d4431..84d5fea0b 100644
--- a/src/Bundle/ChillPersonBundle/Controller/AccompanyingPeriodWorkDuplicateController.php
+++ b/src/Bundle/ChillPersonBundle/Controller/AccompanyingPeriodWorkDuplicateController.php
@@ -18,7 +18,9 @@ use Chill\PersonBundle\Repository\AccompanyingPeriod\AccompanyingPeriodWorkRepos
 use Chill\PersonBundle\Service\AccompanyingPeriodWork\AccompanyingPeriodWorkMergeService;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Translation\TranslatableMessage;
 use Symfony\Contracts\Translation\TranslatorInterface;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
 
@@ -91,6 +93,11 @@ class AccompanyingPeriodWorkDuplicateController extends AbstractController
 
                 $this->accompanyingPeriodWorkMergeService->merge($acpw1, $acpw2);
 
+                $session = $request->getSession();
+                if ($session instanceof Session) {
+                    $session->getFlashBag()->add('success', new TranslatableMessage('acpw_duplicate.Successfully merged'));
+                }
+
                 return $this->redirectToRoute('chill_person_accompanying_period_work_show', ['id' => $acpw1->getId()]);
             }
 
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index 7e993b803..a4f8ec33f 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -1508,3 +1508,4 @@ acpw_duplicate:
     Accompanying period work to keep: Action d'accompagnement à conserver
     to keep: Action d'accompagnement à conserver
     to delete: Action d'accompagnement à supprimer
+    Successfully merged: Action d'accompagnement fusionnée avec succès.