diff -u b/core/modules/xmlrpc/xmlrpc.module b/core/modules/xmlrpc/xmlrpc.module
--- b/core/modules/xmlrpc/xmlrpc.module
+++ b/core/modules/xmlrpc/xmlrpc.module
@@ -15,7 +15,7 @@
     case 'admin/help#xmlrpc':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The XML-RPC module gives external systems the opportunity to communicate with the site through the <a href="http://en.wikipedia.org/wiki/XML-RPC">XML-RPC protocol</a>. An XML-RPC client can communicate with the site by calling <a href="!xrphp">xmlrpc.php</a>. For more information, see <a href="!xrdocs">the online documentation for the XML-RPC module</a>.', array('!xrphp' => $base_url . '/xmlrpc.php','!xrdocs' => 'https://drupal.org/documentation/modules/xmlrpc')) . '</p>';
+      $output .= '<p>' . t('The XML-RPC module gives external systems the opportunity to communicate with the site through the <a href="http://en.wikipedia.org/wiki/XML-RPC">XML-RPC protocol</a>. An XML-RPC client can communicate with the site by making a request to <a href="!xrphp">xmlrpc.php</a>. For more information, see <a href="!xrdocs">the online documentation for the XML-RPC module</a>.', array('!xrphp' => \Drupal::url('xmlrpc.php'),'!xrdocs' => 'https://drupal.org/documentation/modules/xmlrpc')) . '</p>';
       return $output;
   }
 }