diff --git a/lib/Client.php b/lib/Client.php
index 1f46ab1..5d80e11 100644
--- a/lib/Client.php
+++ b/lib/Client.php
@@ -212,7 +212,8 @@ public function receive()
     {
         $filter = $this->options['filter'];
         $return_obj = $this->options['return_obj'];
-
+        $return = null;
+        
         if (!$this->isConnected()) {
             $this->connect();
         }