diff --git a/lib/Kolab/DAV/Node.php b/lib/Kolab/DAV/Node.php
--- a/lib/Kolab/DAV/Node.php
+++ b/lib/Kolab/DAV/Node.php
@@ -170,8 +170,6 @@
 
         // $data can be a resource or a string
         if (is_resource($data)) {
-            rewind($data);
-
             // $data can be php://input or php://temp
             // php://input is not seekable, we need to "convert"
             // it to seekable resource, fstat/rewind later will work
@@ -182,6 +180,9 @@
                 rewind($new_data);
                 $data = $new_data;
             }
+            else {
+                rewind($data);
+            }
         }
 
         $filedata = array(