diff --git a/Message/RequestAbstract.php b/Message/RequestAbstract.php
index 92bc9b1e9..a52930c0f 100644
--- a/Message/RequestAbstract.php
+++ b/Message/RequestAbstract.php
@@ -105,7 +105,7 @@ abstract class RequestAbstract implements RequestInterface
      * @var array
      * @since 1.0.0
      */
-    protected $hash = null;
+    protected $hash = [];
 
     /**
      * Constructor.