diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index 0bc29c61..c6068bcd 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -48,6 +48,7 @@ class Xlsx extends BaseReader
      * @var ReferenceHelper
      */
     private $referenceHelper;
+
     /**
      * Xlsx\Theme instance.
      *