AWS API Compatibilty - TerminateInstancesResponse

When requesting to terminate an instance, the response looks like as below and contains an element
'shutdownState'. The AWS API contains instead an 'currentState' element.

<TerminateInstancesResponse xmlns="http://ec2.amazonaws.com/doc/2010-06-15/">
<requestId>5a266232-ef5d-4e89-92e3-9c236819cfc5</requestId>
<instancesSet>
  <item><instanceId>i-584509B0</instanceId>
  <shutdownState>
    <code>32</code>
    <name>shutting-down</name>
  </shutdownState>
  <previousState>
    <code>0</code>
    <name>pending</name>
  </previousState>
  </item>
</instancesSet>
</TerminateInstancesResponse>