diff --git a/wp-admin/includes/class-wp-plugin-install-list-table.php b/wp-admin/includes/class-wp-plugin-install-list-table.php
index e19d7f4184..69f8aa2840 100644
--- a/wp-admin/includes/class-wp-plugin-install-list-table.php
+++ b/wp-admin/includes/class-wp-plugin-install-list-table.php
@@ -13,6 +13,8 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 	public $orderby = null;
 	public $groups = array();
 
+	private $error;
+
 	public function ajax_user_can() {
 		return current_user_can('install_plugins');
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 86865738f7..747d0900d1 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31163';
+$wp_version = '4.2-alpha-31164';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.