diff --git a/Classes/PHPExcel/Writer/Excel2007.php b/Classes/PHPExcel/Writer/Excel2007.php
index 3d67b3db8..f0486cf95 100644
--- a/Classes/PHPExcel/Writer/Excel2007.php
+++ b/Classes/PHPExcel/Writer/Excel2007.php
@@ -181,7 +181,7 @@ public function save($pFilename = null)
 			// If $pFilename is php://output or php://stdout, make it a temporary file...
 			$originalFilename = $pFilename;
 			if (strtolower($pFilename) == 'php://output' || strtolower($pFilename) == 'php://stdout') {
-				$pFilename = @tempnam(PHPExcel_Shared_File::sys_get_temp_dir(), 'phpxltmp');
+				$pFilename = @tempnam($this->getDiskCachingDirectory(), 'phpxltmp');
 				if ($pFilename == '') {
 					$pFilename = $originalFilename;
 				}