diff --git a/plugins/ActivityPub/Util/Model/Note.php b/plugins/ActivityPub/Util/Model/Note.php
index c4287936cd..c757939a06 100644
--- a/plugins/ActivityPub/Util/Model/Note.php
+++ b/plugins/ActivityPub/Util/Model/Note.php
@@ -40,6 +40,7 @@ use App\Core\Event;
 use App\Core\GSFile;
 use App\Core\HTTPClient;
 use App\Entity\NoteType;
+use Component\Notification\Entity\Attention;
 use function App\Core\I18n\_m;
 use App\Core\Log;
 use App\Core\Router\Router;
@@ -370,6 +371,11 @@ class Note extends Model
                 throw new ServerException('Found an unknown visibility scope which cannot federate.');
         }
 
+        $attention_cc = DB::findBy(Attention::class, ['note_id' => $object->getId()]);
+        foreach($attention_cc as $cc_id) {
+            $attr['cc'][] = \App\Entity\Actor::getById($cc_id->getTargetId())->getUri(Router::ABSOLUTE_URL);
+        }
+
         // Mentions
         foreach ($object->getNotificationTargets() as $mention) {
             $attr['tag'][] = [