diff --git a/src/Message/AuthorizeRequest.php b/src/Message/AuthorizeRequest.php
index 2850215e..c9bc6462 100644
--- a/src/Message/AuthorizeRequest.php
+++ b/src/Message/AuthorizeRequest.php
@@ -284,7 +284,7 @@ public function getData()
         }
 
         if ($this->getApplicationFee()) {
-            $data['application_fee'] = $this->getApplicationFeeInteger();
+            $data['application_fee_amount'] = $this->getApplicationFeeInteger();
         }
 
         if ($this->getTransferGroup()) {