diff --git a/doc/encoders.texi b/doc/encoders.texi
index 496852faeb..1035be0052 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -4105,7 +4105,7 @@ Setting this flag turns on or off LowDelayBRC feautre in qsv plugin, which provi
 more accurate bitrate control to minimize the variance of bitstream size frame
 by frame. Value: -1-default 0-off 1-on
 
-@item max_frame_size
+@item @var{max_frame_size}
 Set the allowed max size in bytes for each frame. If the frame size exceeds
 the limitation, encoder will adjust the QP value to control the frame size.
 Invalid in CQP rate control mode.