diff --git a/reference/constraints/NotEqualTo.rst b/reference/constraints/NotEqualTo.rst
index 6d71b2c6ca1..17c8b5e57f0 100644
--- a/reference/constraints/NotEqualTo.rst
+++ b/reference/constraints/NotEqualTo.rst
@@ -99,7 +99,7 @@ the following:
         {
             public static function loadValidatorMetadata(ClassMetadata $metadata)
             {
-                $metadata->addPropertyConstraint('age', new Assert\NotEqualTo('Mary'));
+                $metadata->addPropertyConstraint('firstName', new Assert\NotEqualTo('Mary'));
 
                 $metadata->addPropertyConstraint('age', new Assert\NotEqualTo(array(
                     'value' => 15,