diff --git a/src/wp-includes/class-wp-http-ixr-client.php b/src/wp-includes/class-wp-http-ixr-client.php
index 2a18716c46..4bf8920235 100644
--- a/src/wp-includes/class-wp-http-ixr-client.php
+++ b/src/wp-includes/class-wp-http-ixr-client.php
@@ -7,6 +7,11 @@
  *
  */
 class WP_HTTP_IXR_Client extends IXR_Client {
+	public $scheme;
+	/**
+	 * @var IXR_Error
+	 */
+	public $error;
 
 	public function __construct($server, $path = false, $port = false, $timeout = 15) {
 		if ( ! $path ) {