spring mvc - Input an enum value in a form as hidden using thymeleaf -

i fill form input hidden using value of enum:

enum:

public enum tipoendereco {     residencial, comercial } 

summarizing html code, i've tried use form input this:

<input type="hidden" th:field="*{endereco[0].tipoendereco}" th:value="residencial"/> 

but unfortunately, field being recorded null. others fields don't use enum in way, being recorded normal. i've used enum fill option, directly input type hidden isn't working. i'm using thymeleaf.