diff --git a/modules/video_filter/opencv_example.cpp b/modules/video_filter/opencv_example.cpp
index 310e16f717..e1fe03e2f1 100644
--- a/modules/video_filter/opencv_example.cpp
+++ b/modules/video_filter/opencv_example.cpp
@@ -37,6 +37,7 @@
 #include <vlc_common.h>
 #include <vlc_plugin.h>
 #include <vlc_filter.h>
+#include <vlc_vout.h>
 #include "filter_common.h"
 #include <vlc_image.h>
 #include "filter_event_info.h"