cvs history -f command

[Abhay Jain]

I am trying the cvs history command with -f option ( to get history for a
particular file) but it seems to be ignoring the -f flag and the file name.

I tried both of the following:

cvs history -f <filename>   ,and
cvs history <filename>

In both the cases, the output I am getting is not just for the <filename>
specified, instead it is complete output. 
It is as if it is ignoring the <filename> parameter.

Is this a known bug, or am I not setup properly ?
Is there any other way to do this (other than 'greping' the output)?

Thanks,

Abhay