--- a/modules/cudaoptflow/src/nvidiaOpticalFlow.cpp.old	2019-12-05 12:50:52.119514860 +0100
+++ b/modules/cudaoptflow/src/nvidiaOpticalFlow.cpp	2019-12-05 12:51:02.939605372 +0100
@@ -12,8 +12,11 @@ Ptr<NvidiaOpticalFlow_1_0> cv::cuda::Nvi
 
 #elif !defined HAVE_NVIDIA_OPTFLOW
 
-CV_Error(cv::Error::HeaderIsNull, "Nvidia Optical Flow headers not found. Make sure cmake downloads it properly");
 
+cv::Ptr<cv::cuda::NvidiaOpticalFlow_1_0> cv::cuda::NvidiaOpticalFlow_1_0::create(int, int, NVIDIA_OF_PERF_LEVEL, bool, bool, bool, int)
+{
+    CV_Error(cv::Error::HeaderIsNull, "OpenCV was build without NVIDIA OpticalFlow support"); 
+}
 #else
 
 #include "nvOpticalFlowCommon.h"