diff --git a/CImg.h b/CImg.h
index af63bcb..c7757fc 100644
--- a/CImg.h
+++ b/CImg.h
@@ -417,6 +417,7 @@
 #endif
 #include <cstddef>
 #include <opencv2/opencv.hpp>
+#include <opencv2/videoio/videoio_c.h>
 #if CV_MAJOR_VERSION >=3
 #define _cimg_fourcc cv::VideoWriter::fourcc
 #else