diff --git a/src/Entities/Transaction.php b/src/Entities/Transaction.php
index ffae75b6..793b8714 100644
--- a/src/Entities/Transaction.php
+++ b/src/Entities/Transaction.php
@@ -319,13 +319,15 @@ public function hold()
      * Refunds/returns the original transaction.
      *
      * @param string|float $amount The amount to refund/return
+     * @param string $currency The currency to refund/return
      *
      * @return ManagementBuilder
      */
-    public function refund($amount = null)
+    public function refund($amount = null, $currency = null)
     {
         return (new ManagementBuilder(TransactionType::REFUND))
             ->withPaymentMethod($this->transactionReference)
+            ->withCurrency($currency)
             ->withAmount($amount);
     }