diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
index b3bb9575b2e014dc6e090b8a1b9b639d9bfd9a00..e9f6735c08233bc360339bf0171504f87d652091 100644
--- a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
@@ -327,7 +327,12 @@ These controls are described in .
-
+
+ V4L2_CTRL_CLASS_RF_TUNER
+ 0xa20000
+ The class containing RF tuner controls.
+These controls are described in .
+