diff --git a/lib/Alchemy/Phrasea/Controller/Admin/Collection.php b/lib/Alchemy/Phrasea/Controller/Admin/Collection.php
index 0aacf8f851..8c6f4ced84 100644
--- a/lib/Alchemy/Phrasea/Controller/Admin/Collection.php
+++ b/lib/Alchemy/Phrasea/Controller/Admin/Collection.php
@@ -495,7 +495,9 @@ class Collection implements ControllerProviderInterface
                 $collection->empty_collection(500);
                 $msg = _('Collection empty successful');
             } else {
-                $settings = '<?xml version="1.0" encoding="UTF-8"?><tasksettings><bas_id>' . $collection->get_base_id() . '</bas_id></tasksettings>';
+                $settings = \task_period_emptyColl::getDefaultSettings($app['phraseanet.configuration'], array(
+                    'bas_id' => $collection->get_base_id()
+                ));
                 \task_period_emptyColl::create($app, $settings);
                 $msg = _('A task has been creted, please run it to complete empty collection');
             }
diff --git a/lib/classes/task/period/emptyColl.php b/lib/classes/task/period/emptyColl.php
index 9b91c8f0df..c9e4701a20 100644
--- a/lib/classes/task/period/emptyColl.php
+++ b/lib/classes/task/period/emptyColl.php
@@ -9,6 +9,8 @@
  * file that was distributed with this source code.
  */
 
+use Alchemy\Phrasea\Core\Configuration\Configuration;
+
 class task_period_emptyColl extends task_appboxAbstract
 {
     protected $base_id;
@@ -30,13 +32,13 @@ class task_period_emptyColl extends task_appboxAbstract
         return("Vide une collection");
     }
 
-     /**
+    /**
      *
      * @param array $params
      */
     public static function getDefaultSettings(Configuration $config, array $params = array())
     {
-        return "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<tasksettings>\n</tasksettings>";
+        return '<?xml version="1.0" encoding="UTF-8"?><tasksettings><bas_id>' . (isset($params['bas_id']) ? $params['bas_id'] : '' ) . '</bas_id></tasksettings>';
     }
 
     protected function loadSettings(SimpleXMLElement $sx_task_settings)