diff --git a/src/OpenCV.h b/src/OpenCV.h
index cc9a2b91..7483fd49 100755
--- a/src/OpenCV.h
+++ b/src/OpenCV.h
@@ -23,6 +23,7 @@
 #include <opencv2/imgproc.hpp>
 #include <opencv2/videoio.hpp>
 #include <opencv2/opencv_modules.hpp>
+#include <opencv2/video/tracking.hpp>
 #endif
 #if ((CV_MAJOR_VERSION == 2) && (CV_MINOR_VERSION >=4) && (CV_SUBMINOR_VERSION>=4))
 #define HAVE_OPENCV_FACE