diff --git a/CRM/Core/Payment/Stripe.php b/CRM/Core/Payment/Stripe.php
index 44d0adafd7e07598e183dc5d9b0f88ae17f6a237..eaa1cb8f8596f6fa0fa55b90f26d3dae16ecb421 100644
--- a/CRM/Core/Payment/Stripe.php
+++ b/CRM/Core/Payment/Stripe.php
@@ -702,7 +702,7 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
    * @return array
    * @throws \Civi\Payment\Exception\PaymentProcessorException
    */
-  public function doRefund($params) {
+  public function doRefund(&$params) {
     $requiredParams = ['trxn_id', 'amount'];
     foreach ($requiredParams as $required) {
       if (!isset($params[$required])) {