removed extra quote

1 files changed, 1 insertions, 1 deletions

diff --git a/user_guide_src/source/libraries/form_validation.rst b/user_guide_src/source/libraries/form_validation.rst
index 2b7780ff2..aae9e3b89 100644
--- a/user_guide_src/source/libraries/form_validation.rst
+++ b/user_guide_src/source/libraries/form_validation.rst
@@ -519,7 +519,7 @@ the second element of an array, with the first one being the rule name::
 		'username', 'Username',
 		array(
 			'required',
-			array('username_callable', array($this->users_model', 'valid_username'))
+			array('username_callable', array($this->users_model, 'valid_username'))
 		)
 	);