diff --git a/src/wp-admin/includes/upgrade.php b/src/wp-admin/includes/upgrade.php
index 86d7dedc78..9bdc2e77ed 100644
--- a/src/wp-admin/includes/upgrade.php
+++ b/src/wp-admin/includes/upgrade.php
@@ -1962,11 +1962,10 @@ function upgrade_430() {
  * @ignore
  * @since 4.3.0
  *
- * @global int  $wp_current_db_version The old (current) database version.
- * @global wpdb $wpdb                  WordPress database abstraction object.
+ * @global wpdb $wpdb WordPress database abstraction object.
  */
 function upgrade_430_fix_comments() {
-	global $wp_current_db_version, $wpdb;
+	global $wpdb;
 
 	$content_length = $wpdb->get_col_length( $wpdb->comments, 'comment_content' );