diff --git a/src/Message/Message.php b/src/Message/Message.php
index 6ff1fc8..f288af4 100644
--- a/src/Message/Message.php
+++ b/src/Message/Message.php
@@ -46,7 +46,7 @@ abstract class Message implements MessageInterface
         if ($body !== null) {
             $this->body = $body;
         } else {
-            $this->body = new NullStream();
+            $this->body = new Stream('');
         }
     }