diff --git a/Tests/Recurly/Billing_Info_Test.php b/Tests/Recurly/Billing_Info_Test.php
index b053fbbe..721b60ef 100644
--- a/Tests/Recurly/Billing_Info_Test.php
+++ b/Tests/Recurly/Billing_Info_Test.php
@@ -214,15 +214,18 @@ public function testForOnlineBankingPaymentType() {
 
   public function testForGatewayToken() {
     $billing_info = new Recurly_BillingInfo(null, $this->client);
+    $gateway_attributes = new Recurly_GatewayAttributes();
+    $gateway_attributes->account_reference = '123ABC';
     $billing_info->gateway_token = 'x1x2x3';
     $billing_info->gateway_code = 'abc123';
     $billing_info->month = '11';
     $billing_info->year = '2025';
+    $billing_info->gateway_attributes = $gateway_attributes;
 
     $this->assertInstanceOf('Recurly_BillingInfo', $billing_info);
     $this->assertEquals(
       $billing_info->xml(),
-      "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<billing_info><month>11</month><year>2025</year><gateway_token>x1x2x3</gateway_token><gateway_code>abc123</gateway_code></billing_info>\n"
+      "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<billing_info><month>11</month><year>2025</year><gateway_token>x1x2x3</gateway_token><gateway_code>abc123</gateway_code><gateway_attributes><account_reference>123ABC</account_reference></gateway_attributes></billing_info>\n"
     );
   }
 
diff --git a/lib/recurly.php b/lib/recurly.php
index f994e787..30bd8b64 100644
--- a/lib/recurly.php
+++ b/lib/recurly.php
@@ -97,6 +97,7 @@
 require_once(__DIR__ . '/recurly/gift_card.php');
 require_once(__DIR__ . '/recurly/gift_card_list.php');
 require_once(__DIR__ . '/recurly/delivery.php');
+require_once(__DIR__ . '/recurly/gateway_attributes.php');
 
 require_once(__DIR__ . '/recurly/push_notification.php');
 require_once(__DIR__ . '/recurly/util/hmac_hash.php');
diff --git a/lib/recurly/billing_info.php b/lib/recurly/billing_info.php
index 8546df0b..d3ee35ee 100644
--- a/lib/recurly/billing_info.php
+++ b/lib/recurly/billing_info.php
@@ -29,6 +29,7 @@
  * @property string $online_banking_payment_type Used to indicate payment made out of via an online banking (e.g. ideal).
  * @property string $gateway_token The token generated by the payment gateway (Vantiv for example). When using this attribute you must set gateway_code. Also, billing_info.month will be the month of the token's expiration instead of the card's expiration month, and billing_info.year will be the year of the token's expiration instead of the card's expiration year.
  * @property string $gateway_code The identifier for the gateway to use. This code can be found on the payment gateways page in the admin UI.
+ * @property Recurly_GatewayAttributes $gateway_attributes Additional attributes to send to the gateway
  * @property int $account_number Bank account number between 4 and 17 digits.
  * @property int $routing_number Must be a real U.S. bank account routing number. All routing numbers are 9 digits.
  * @property string $name_on_account The name associated with the bank account. This may be a person's full name or a business name.
@@ -146,7 +147,7 @@ protected function getWriteableAttributes() {
       'vat_number', 'number', 'month', 'year', 'verification_value',
       'account_number', 'routing_number', 'account_type',
       'paypal_billing_agreement_id', 'amazon_billing_agreement_id', 'currency',
-      'token_id', 'external_hpp_type', 'gateway_token', 'gateway_code',
+      'token_id', 'external_hpp_type', 'gateway_token', 'gateway_code', 'gateway_attributes',
       'braintree_payment_nonce', 'roku_billing_agreement_id',
       'three_d_secure_action_result_token_id', 'transaction_type', 'iban', 'sort_code', 'bsb_code', 'type',
       'tax_identifier', 'tax_identifier_type', 'primary_payment_method', 'backup_payment_method',
diff --git a/lib/recurly/gateway_attributes.php b/lib/recurly/gateway_attributes.php
new file mode 100644
index 00000000..ccb8a111
--- /dev/null
+++ b/lib/recurly/gateway_attributes.php
@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * Class Recurly_GatewayAttributes
+ * @property string $account_reference Used by Adyen gateways. The Shopper Reference value used when the external token was created. Must be used in conjunction with gateway_token and gateway_code.
+ */
+class Recurly_GatewayAttributes extends Recurly_Resource
+{
+  protected function getNodeName() {
+    return 'gateway_attributes';
+  }
+  protected function getWriteableAttributes() {
+    return array(
+      'account_reference'
+    );
+  }
+}
diff --git a/lib/recurly/util/xml_tools.php b/lib/recurly/util/xml_tools.php
index 3a930252..5f25c119 100644
--- a/lib/recurly/util/xml_tools.php
+++ b/lib/recurly/util/xml_tools.php
@@ -65,6 +65,7 @@ class XmlTools
     'external_subscription' => 'Recurly_ExternalSubscription',
     'external_subscriptions' => 'Recurly_ExternalSubscriptionList',
     'fraud' => 'Recurly_FraudInfo',
+    'gateway_attributes' => 'Recurly_GatewayAttributes',
     'gift_card' => 'Recurly_GiftCard',
     'gift_cards' => 'Recurly_GiftCardList',
     'gifter_account' => 'Recurly_Account',