diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index bc5dd8e76567..de5990038bb2 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -1796,7 +1796,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
       -
     * - __u32
       - ``dec_ref_pic_marking_bit_size``
-      -
+      - Size in bits of the dec_ref_pic_marking() syntax element.
     * - __u32
       - ``pic_order_cnt_bit_size``
       -