--- ext/opencv/gsthanddetect.h.orig	2018-05-02 20:46:12.793424000 +0000
+++ ext/opencv/gsthanddetect.h	2018-05-02 20:46:29.272504000 +0000
@@ -45,7 +45,7 @@
 #ifndef __GST_HANDDETECT_H__
 #define __GST_HANDDETECT_H__
 
-#include <cv.h>
+#include <opencv/cv.h>
 
 #include <gst/opencv/gstopencvvideofilter.h>
 /* opencv */