Assertion failure durring defishing in initUndistortRectifyMap

I'm trying to do fish an image by providing "camera_matrix" and "distortion_coefficients" to cv::fisheye::undistortImage. problem is I'm getting Assertion error. Reason is the distortion coefficients which i'm getting through camera calibration are 5x1 `51

d

-2.0834245161331000e-01 5.8179563841609050e-02 0. 0. -8.0440183287724919e-03` but `undistortImage` method accepts 4X1 distortion matrix. Any idea whats the way around to this problem