diff --git a/synchro/synchrodatasource.class.inc.php b/synchro/synchrodatasource.class.inc.php
index 533330519..38cf290c4 100644
--- a/synchro/synchrodatasource.class.inc.php
+++ b/synchro/synchrodatasource.class.inc.php
@@ -1508,6 +1508,7 @@ class SynchroReplica extends DBObject implements iDisplay
 			"db_key_field" => "id",
 			"db_finalclass_field" => "",
 			"display_template" => "",
+			"indexes" => array( array ('dest_class', 'dest_id'), ),
 		);
 		MetaModel::Init_Params($aParams);
 		MetaModel::Init_InheritAttributes();