diff --git a/_includes/_annotation_loader_tip.rst.inc b/_includes/_annotation_loader_tip.rst.inc
new file mode 100644
index 00000000000..ed43b8f51d8
--- /dev/null
+++ b/_includes/_annotation_loader_tip.rst.inc
@@ -0,0 +1,19 @@
+.. note::
+
+    In order to use the annotation loader, you should have installed the
+    ``doctrine/annotations`` and ``doctrine/cache`` packages with Composer.
+
+.. tip::
+
+    Annotation classes aren't loaded automatically, so you must load them
+    using a class loader like this::
+
+        use Composer\Autoload\ClassLoader;
+        use Doctrine\Common\Annotations\AnnotationRegistry;
+
+        /** @var ClassLoader $loader */
+        $loader = require __DIR__.'/../vendor/autoload.php';
+
+        AnnotationRegistry::registerLoader([$loader, 'loadClass']);
+
+        return $loader;
diff --git a/components/routing.rst b/components/routing.rst
index 686faf31ccb..1b8c291fa6e 100644
--- a/components/routing.rst
+++ b/components/routing.rst
@@ -312,6 +312,8 @@ Last but not least there are
 route definitions from class annotations. The specific details are left
 out here.
 
+.. include:: /_includes/_rewrite_rule_tip.rst.inc
+
 The all-in-one Router
 ~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/components/serializer.rst b/components/serializer.rst
index cb16d951afc..668039f4b05 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -312,6 +312,8 @@ You are now able to serialize only attributes in the groups you want::
     );
     // $obj2 = MyObj(foo: 'foo', bar: 'bar')
 
+.. include:: /_includes/_rewrite_rule_tip.rst.inc
+
 .. _ignoring-attributes-when-serializing:
 
 Ignoring Attributes
diff --git a/components/validator/resources.rst b/components/validator/resources.rst
index 23e5ba83cde..b8e16755cda 100644
--- a/components/validator/resources.rst
+++ b/components/validator/resources.rst
@@ -119,10 +119,7 @@ method. It takes an optional annotation reader instance, which defaults to
 To disable the annotation loader after it was enabled, call
 :method:`Symfony\\Component\\Validator\\ValidatorBuilder::disableAnnotationMapping`.
 
-.. note::
-
-    In order to use the annotation loader, you should have installed the
-    ``doctrine/annotations`` and ``doctrine/cache`` packages from `Packagist`_.
+.. include:: /_includes/_rewrite_rule_tip.rst.inc
 
 Using Multiple Loaders
 ----------------------