diff --git a/wp-admin/admin-db.php b/wp-admin/admin-db.php
index bd58265c4d..ea31c7e358 100644
--- a/wp-admin/admin-db.php
+++ b/wp-admin/admin-db.php
@@ -108,7 +108,7 @@ function wp_insert_category($catarr) {
 	$category_description = apply_filters('pre_category_description', $category_description);
 
 	$category_parent = (int) $category_parent;
-	if ( empty($category_parent) || !get_category( $category_parent ) || ($cat_ID && _cat_is_ancestor_of($cat_ID, $category_parent) ) )
+	if ( empty($category_parent) || !get_category( $category_parent ) || ($cat_ID && cat_is_ancestor_of($cat_ID, $category_parent) ) )
 		$category_parent = 0;
 
 	if ( isset($posts_private) )