diff --git a/library/Zend/View/Helper/Navigation/HelperAbstract.php b/library/Zend/View/Helper/Navigation/HelperAbstract.php
index 74d3cc8843..2e733e4423 100644
--- a/library/Zend/View/Helper/Navigation/HelperAbstract.php
+++ b/library/Zend/View/Helper/Navigation/HelperAbstract.php
@@ -952,7 +952,7 @@ public static function setDefaultAcl(Zend_Acl $acl = null)
      * Sets default ACL role(s) to use when iterating pages if not explicitly
      * set later with {@link setRole()}
      *
-     * @param  midex $role               [optional] role to set. Expects null,
+     * @param  mixed $role               [optional] role to set. Expects null,
      *                                   string, or an instance of
      *                                   {@link Zend_Acl_Role_Interface}.
      *                                   Default is null, which sets no default