diff --git a/security/passwords.rst b/security/passwords.rst
index 6bf37d51806..e30e517f895 100644
--- a/security/passwords.rst
+++ b/security/passwords.rst
@@ -101,7 +101,7 @@ optionally some *algorithm options*:
             User::class => ['algorithm' => 'auto'],
 
             // auto hasher with custom options for all PasswordAuthenticatedUserInterface instances
-            User::class => [
+            PasswordAuthenticatedUserInterface::class => [
                 'algorithm' => 'auto',
                 'cost' => 15,
             ],