diff --git a/modules/document/document.model.php b/modules/document/document.model.php
index 167de6279..deb2444d0 100644
--- a/modules/document/document.model.php
+++ b/modules/document/document.model.php
@@ -262,6 +262,7 @@ class documentModel extends document
 				$keys = array_keys($output->data);
 				$virtual_number = $keys[0];
 
+				$target_args = new stdClass();
 				$target_args->document_srls = implode(',',$target_srls);
 				$target_args->list_order = $args->sort_index;
 				$target_args->order_type = $args->order_type;