diff --git a/library/ZipStream/ZipStream.php b/library/ZipStream/ZipStream.php
index 3b16d308d..58c42f17b 100644
--- a/library/ZipStream/ZipStream.php
+++ b/library/ZipStream/ZipStream.php
@@ -155,9 +155,9 @@ function __construct($name = null, $opt = array()) {
     # save options
     $this->opt = $opt;
 
-    # set large file defaults: size = 20 megabytes, method = store
+    # set large file defaults: size = 3 megabytes, method = store
     if (!isset($this->opt['large_file_size']))
-      $this->opt['large_file_size'] = 20 * 1024 * 1024;
+      $this->opt['large_file_size'] = 3 * 1024 * 1024;
     if (!isset($this->opt['large_file_method']))
       $this->opt['large_file_method'] = 'store';