diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index c64e76a087b41efe919feb6480340365c1607a86..11b8b3ec77b4585a0adaa2cdc9bb16c2fa6739bf 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -830,6 +830,7 @@ struct v4l2_querymenu {
 #define V4L2_CTRL_FLAG_UPDATE 		0x0008
 #define V4L2_CTRL_FLAG_INACTIVE 	0x0010
 #define V4L2_CTRL_FLAG_SLIDER 		0x0020
+#define V4L2_CTRL_FLAG_WRITE_ONLY 	0x0040
 
 /*  Query flag, to be ORed with the control ID */
 #define V4L2_CTRL_FLAG_NEXT_CTRL	0x80000000