diff --git a/lib/files.php b/lib/files.php
index f1cf7573ba..e7bfbbc19b 100644
--- a/lib/files.php
+++ b/lib/files.php
@@ -63,7 +63,7 @@ class OC_Files {
 			$executionTime = intval(ini_get('max_execution_time'));
 			set_time_limit(0);
 			$zip = new ZipArchive();
-			$filename = get_temp_dir()."/ownCloud.zip";
+			$filename = get_temp_dir().'/ownCloud_'.mt_rand(10000,99999).'.zip';
 			if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
 				exit("cannot open <$filename>\n");
 			}
@@ -84,7 +84,7 @@ class OC_Files {
 			$executionTime = intval(ini_get('max_execution_time'));
 			set_time_limit(0);
 			$zip = new ZipArchive();
-			$filename = get_temp_dir()."/ownCloud.zip";
+			$filename = get_temp_dir().'/ownCloud_'.mt_rand(10000,99999).'.zip';
 			if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
 				exit("cannot open <$filename>\n");
 			}