convert-mapping can't create YML from Annotation when Id column is a OneToOne relationship

I have two entities

/**

• @ORM\Entity
  */
  class User { /** * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") * @ORM\Column(type="integer") */ private $id }

/**

• @ORM\Entity
  */
  class UserData { /** * @ORM\Id * @ORM\OneToOne(targetEntity="User") */ private $id }

When I convert these with symfony's

doctrine:mapping:convert yml test/

it generates an entity definition for UserData without any id fields, which, of course, cannot be imported to the database, as the new entity doesn't have an identifier column.