diff --git a/components/options_resolver.rst b/components/options_resolver.rst
index 7320962fdba..9d4f00285f1 100644
--- a/components/options_resolver.rst
+++ b/components/options_resolver.rst
@@ -96,7 +96,7 @@ the ``Mailer`` class makes a mistake?
 .. code-block:: php
 
     $mailer = new Mailer(array(
-        'usernme' => 'johndoe',
+        'usernme' => 'johndoe',  // usernAme misspelled 
     ));
 
 No error will be shown. In the best case, the bug will appear during testing,