diff --git a/components/workflow.rst b/components/workflow.rst
index 39406afa1e4..8a0daf1f7fb 100644
--- a/components/workflow.rst
+++ b/components/workflow.rst
@@ -63,6 +63,7 @@ A registry will also help you to decide if a workflow supports the object you
 are trying to use it with::
 
     use Symfony\Component\Workflow\Registry;
+    use Symfony\Component\Workflow\WorkflowInterface\InstanceOfSupportStrategy;
     use Acme\Entity\BlogPost;
     use Acme\Entity\Newsletter;
 
@@ -70,8 +71,8 @@ are trying to use it with::
     $newsletterWorkflow = ...
 
     $registry = new Registry();
-    $registry->addWorkflow($blogWorkflow, BlogPost::class);
-    $registry->addWorkflow($newsletterWorkflow, Newsletter::class);
+    $registry->addWorkflow($blogWorkflow, new InstanceOfSupportStrategy(BlogPost::class));
+    $registry->addWorkflow($newsletterWorkflow, new InstanceOfSupportStrategy(Newsletter::class));
     
 .. versionadded:: 4.1
     The ``addWorkflow()`` method was introduced in Symfony 4.1. In previous