diff --git a/modules/trackback/trackback.model.php b/modules/trackback/trackback.model.php
index bdabf8878..ce32bf0d6 100644
--- a/modules/trackback/trackback.model.php
+++ b/modules/trackback/trackback.model.php
@@ -89,7 +89,7 @@
             if(is_array($obj->module_srl)) $args->module_srl = implode(',', $obj->module_srl);
             else $args->module_srl = $obj->module_srl;
             $args->list_count = $obj->list_count;
-            $args->site_srl = (int)$obj->site_srl;
+            if($obj->site_srl) $args->site_srl = (int)$obj->site_srl;
             $args->sort_index = 'trackbacks.list_order';
             $args->order = 'asc';