diff --git a/components/security/authentication.rst b/components/security/authentication.rst
index af2ce05b78a..f72657feecf 100644
--- a/components/security/authentication.rst
+++ b/components/security/authentication.rst
@@ -213,6 +213,7 @@ own, it just needs to follow these rules:
    :method:`Symfony\\Component\\Security\\Core\\Encoder\\BasePasswordEncoder::isPasswordTooLong`
    method for this check::
 
+       use Symfony\Component\Security\Core\Encoder\BasePasswordEncoder;
        use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 
        class FoobarEncoder extends BasePasswordEncoder