diff --git a/src/MAPI/OLE/Pear/DocumentElement.php b/src/MAPI/OLE/Pear/DocumentElement.php
index ffaf205..ad23b76 100644
--- a/src/MAPI/OLE/Pear/DocumentElement.php
+++ b/src/MAPI/OLE/Pear/DocumentElement.php
@@ -187,7 +187,7 @@ public function saveToStream($stream)
 
         // nasty Pear_OLE actually writes out a temp file and fpassthru's on it. Yuck.
         // so let's give a wrapped stream which ignores Pear_OLE's fopen() and fclose()
-        $wrappedStreamUrl = StreamWrapper::wrapStream($stream);
+        $wrappedStreamUrl = StreamWrapper::wrapStream($stream, 'r');
         $root->save($wrappedStreamUrl);
 
         /*ob_start();