diff --git a/enrol/paypal/lib.php b/enrol/paypal/lib.php
index fda630213fd..f3762d78e4c 100644
--- a/enrol/paypal/lib.php
+++ b/enrol/paypal/lib.php
@@ -38,7 +38,7 @@ class enrol_paypal_plugin extends enrol_plugin {
         // 3-character ISO-4217: https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_api_currency_codes
         $codes = array(
             'AUD', 'BRL', 'CAD', 'CHF', 'CZK', 'DKK', 'EUR', 'GBP', 'HKD', 'HUF', 'ILS', 'JPY',
-            'MXN', 'MYR', 'NOK', 'NZD', 'PHP', 'PLN', 'SEK', 'SGD', 'THB', 'TRY', 'TWD', 'USD');
+            'MXN', 'MYR', 'NOK', 'NZD', 'PHP', 'PLN', 'RUB', 'SEK', 'SGD', 'THB', 'TRY', 'TWD', 'USD');
         $currencies = array();
         foreach ($codes as $c) {
             $currencies[$c] = new lang_string($c, 'core_currencies');