diff --git a/wp-includes/class-wpdb.php b/wp-includes/class-wpdb.php
index 39c467f031..baba39d91f 100644
--- a/wp-includes/class-wpdb.php
+++ b/wp-includes/class-wpdb.php
@@ -690,6 +690,21 @@ class wpdb {
 	 */
 	private $allow_unsafe_unquoted_parameters = true;
 
+	/**
+	 * Whether to use the mysqli extension over mysql. This is no longer used as the mysql
+	 * extension is no longer supported.
+	 *
+	 * Default true.
+	 *
+	 * @since 3.9.0
+	 * @since 6.4.0 This property was removed.
+	 * @since 6.4.1 This property was reinstated and its default value was changed to true.
+	 *              The property is no longer used in core but may be accessed externally.
+	 *
+	 * @var bool
+	 */
+	private $use_mysqli = true;
+
 	/**
 	 * Whether we've managed to successfully connect at some point.
 	 *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8f9d37613a..627a5bb451 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57086';
+$wp_version = '6.5-alpha-57089';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.