diff --git a/src/SplStack.php b/src/SplStack.php
index b068a1da9..139908ad2 100644
--- a/src/SplStack.php
+++ b/src/SplStack.php
@@ -35,7 +35,7 @@ class SplStack extends \SplStack implements Serializable
     /**
      * Serialize to an array representing the stack
      * 
-     * @return void
+     * @return array
      */
     public function toArray()
     {