diff --git a/src/wp-admin/includes/file.php b/src/wp-admin/includes/file.php
index 20af7419e0..cb85c05eca 100644
--- a/src/wp-admin/includes/file.php
+++ b/src/wp-admin/includes/file.php
@@ -224,6 +224,7 @@ function validate_file_to_edit( $file, $allowed_files = '' ) {
  * Handle PHP uploads in WordPress, sanitizing file names, checking extensions for mime type,
  * and moving the file to the appropriate directory within the uploads directory.
  *
+ * @access private
  * @since 4.0.0
  *
  * @see wp_handle_upload_error