New binlog: Description of innodb-binlog-state-interval in help/I_S does not correlate with InnoDB expectations

The server help and I_S system variables comment for INNODB_BINLOG_STATE_INTERVAL say:

--innodb-binlog-state-interval=#
Interval (in bytes) at which to write the GTID binlog
state to binlog files to speed up GTID lookups. Must be a
multiple of the binlog page size (16384 bytes)

InnoDB disagrees, e.g. with innodb-binlog-state-interval=1638400 it fails to start saying

[ERROR] InnoDB: innodb_binlog_state_interval must be a power-of-two multiple of the innodb binlog page size=16 KiB

I guess the description needs to be modified.