getting compilation error with estimateRigidTransform

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I am trying to use estimateRigidTransform but I am getting error

error C2039: 'estimateRigidTransform' : is not a member of 'cv'

I have included

include <opencv2/core/core.hpp>
include <opencv2/imgproc/imgproc.hpp>
include <opencv2/highgui/highgui.hpp>
include <opencv2/features2d/features2d.hpp>
include <opencv2/nonfree/features2d.hpp>
include <opencv2/calib3d/calib3d.hpp>
include <opencv2/ts/ts.hpp>

what I am missing so that estimateRigidTransform can not be recognized