diff --git a/src/Message/AuthorizeRequest.php b/src/Message/AuthorizeRequest.php
index e17150c..4348e41 100644
--- a/src/Message/AuthorizeRequest.php
+++ b/src/Message/AuthorizeRequest.php
@@ -231,6 +231,7 @@ public function getData()
 
         $data['TENDER'] = 'C';
         $data['AMT'] = $this->getAmount();
+        $data['CURRENCY'] = $this->getCurrency();
         $data['COMMENT1'] = $this->getDescription();
         $data['COMMENT2'] = $this->getComment2();
         $data['ORDERID'] = $this->getTransactionId();