diff --git a/upload/admin/controller/sale/order.php b/upload/admin/controller/sale/order.php
index 68f2618dd81..2c5b67c1801 100644
--- a/upload/admin/controller/sale/order.php
+++ b/upload/admin/controller/sale/order.php
@@ -2153,7 +2153,9 @@ public function shipping() {
 
 	public function api() {
 		$this->load->language('sale/order');
-
+		
+		$json = array();
+		
 		if ($this->validate()) {
 			// Store
 			if (isset($this->request->get['store_id'])) {