diff --git a/Classes/PHPExcel/Shared/ZipArchive.php b/Classes/PHPExcel/Shared/ZipArchive.php
index 5507210a..9a801a84 100644
--- a/Classes/PHPExcel/Shared/ZipArchive.php
+++ b/Classes/PHPExcel/Shared/ZipArchive.php
@@ -26,7 +26,7 @@
  */
 
 if (!defined('PCLZIP_TEMPORARY_DIR')) {
-	define('PCLZIP_TEMPORARY_DIR', PHPExcel_Shared_File::sys_get_temp_dir());
+	define('PCLZIP_TEMPORARY_DIR', PHPExcel_Shared_File::sys_get_temp_dir() . DIRECTORY_SEPARATOR);
 }
 require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/PCLZip/pclzip.lib.php';