diff --git a/src/Appwrite/Database/Document.php b/src/Appwrite/Database/Document.php
index 2c0ad4131d..575b86bff7 100644
--- a/src/Appwrite/Database/Document.php
+++ b/src/Appwrite/Database/Document.php
@@ -21,7 +21,7 @@ class Document extends ArrayObject
      * @param int    $flags
      * @param string $iterator_class
      */
-    public function __construct($input = null, $flags = 0, $iterator_class = 'ArrayIterator')
+    public function __construct($input = [], $flags = 0, $iterator_class = 'ArrayIterator')
     {
         foreach ($input as $key => &$value) {
             if (\is_array($value)) {