Can't use OpenCV with CUDA. Missing cudaarithm.hpp

I wand to write an OpenCV program to manipulate matrices using CUDA.

OpenCV 3.3.1 installed on host from the NVIDIA SDK Manager

I use in code

#include <opencv2/core/cuda.hpp>
#include <opencv2/cudaarithm.hpp>

But #include <opencv2/cudaarithm.hpp> is not found.

Searched my whole system for cudaarithm.hpp and did not find!!

What is the proper way to use CUDA functionality in the NVIDIA provided OpenCV 3.3.1?

Many Thanks!

Dave