Unique field dependency is not autodetected by Features

When I add a content type (that has Unique fields dependency, ie. there is at least one field checked to be unique on content type edit form) component to a feature, Unique field module is not added automatically as a depend. Expected behavior would be that unique_field.module would get added as a dependency component to the feature if such a content type component is added to the feature that has Unique field dependency (like above).