diff --git a/sys/compat/linux/linux_ioctl.c b/sys/compat/linux/linux_ioctl.c
index 0a8e5087984b..93a3edad8460 100644
--- a/sys/compat/linux/linux_ioctl.c
+++ b/sys/compat/linux/linux_ioctl.c
@@ -2843,6 +2843,8 @@ linux_to_bsd_v4l_window(struct l_video_window *lvw, struct video_window *vw)
 static int
 bsd_to_linux_v4l_window(struct video_window *vw, struct l_video_window *lvw)
 {
+	memset(lvw, 0, sizeof(*lvw));
+
 	lvw->x = vw->x;
 	lvw->y = vw->y;
 	lvw->width = vw->width;