nav_msgs::Path without the field "pose" ?!?!

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Hi, I m trying to compile a code but I cannot do that since I m getting the following error:

error: ‘nav_msgs::Path_<std::allocator<void> >::_poses_type’ has no member named ‘pose’

But in the API documentation it is reported to have such field. Furthermore I tried to echo another package not made by me and it outputs:

header: 
  seq: 25
  stamp: 
    secs: 1415216779
    nsecs: 703217309
  frame_id: map
poses: 
  - 
    header: 
      seq: 0
      stamp: 
        secs: 1415216779
        nsecs: 703217309
      frame_id: map
    pose: 
      position: 
        x: 5.84004402161
        y: -0.0
        z: 0.0
      orientation: 
        x: 0.0
        y: 0.0
        z: 0.0
        w: 1.0

as you can see there is poses and pose. In my CMakeLists.txt I have already enable to compile for nav_msgs too. What could be?