diff --git a/src/Client.php b/src/Client.php
index dfcb231..0b4967f 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -436,6 +436,11 @@ public function getSupplier($idsupplier)
     /*
      * Purchase orders
      */
+    public function addPurchaseorder($params)
+    {
+        return $this->sendRequest('/purchaseorders', $params, self::METHOD_POST);
+    }
+
     public function getPurchaseorders($filters = array())
     {
         return $this->sendRequest('/purchaseorders', null, null, $filters);