diff --git a/application/displayblock.class.inc.php b/application/displayblock.class.inc.php
index 4d18256e9c..cfd87be1cb 100644
--- a/application/displayblock.class.inc.php
+++ b/application/displayblock.class.inc.php
@@ -159,6 +159,7 @@ class DisplayBlock
 				'hidden_criteria',  /** string search criteria not visible */
 				'baseClass',        /** string base class */
 				'action',           /** string */
+				'open',             /** bool open by default the search */
 			], DataTableFactory::GetAllowedParams()),
 			'search' => array_merge([
 				'baseClass',        /** string search root class */