Доступ к значению хэш-карты по переменной в JSP

I have a hashmap, which is put to the request:

HashMap<Integer, String> myMap = ...
request.setAttribute("myMap", myMap);

In JSP I have a foreach loop

<c:forEach items="${list}" var="item" varStatus="status">
   <c:out value="${item.description}"/>
   <c:out value="${myMap[item.id]}"/>
</c:forEach>

but ${myMap[item.id]} does not work. How can I access hashmap's value by item.id variable ?