diff --git a/cookbook/validation/custom_constraint.rst b/cookbook/validation/custom_constraint.rst
index 02ac6651c38..d8251d442c0 100644
--- a/cookbook/validation/custom_constraint.rst
+++ b/cookbook/validation/custom_constraint.rst
@@ -52,7 +52,7 @@ In other words, if you create a custom ``Constraint`` (e.g. ``MyConstraint``),
 Symfony2 will automatically look for another class, ``MyConstraintValidator``
 when actually performing the validation.
 
-The validator class is also simple, and only has one required method: ``validate``::
+The validator class is also simple, and only has one required method ``validate()``::
 
     // src/Acme/DemoBundle/Validator/Constraints/ContainsAlphanumericValidator.php
     namespace Acme\DemoBundle\Validator\Constraints;