diff --git a/Alert.php b/Alert.php
index 18f3960..68ce8c0 100644
--- a/Alert.php
+++ b/Alert.php
@@ -52,7 +52,7 @@ class Alert extends Widget
      */
     public $body;
     /**
-     * @var array the options for rendering the close button tag.
+     * @var array|false the options for rendering the close button tag.
      * The close button is displayed in the header of the modal window. Clicking
      * on the button will hide the modal window. If this is false, no close button will be rendered.
      *