diff --git a/components/serializer.rst b/components/serializer.rst
index 7056f6bc917..04edfdf4cd5 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -254,14 +254,14 @@ for each format:
 
     $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
 
-* XML files::
+* YAML files::
 
     use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
     use Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader;
 
     $classMetadataFactory = new ClassMetadataFactory(new YamlFileLoader('/path/to/your/definition.yaml'));
 
-* YAML files::
+* XML files::
 
     use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
     use Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader;