My /etc/magic file is corrupt. How to regenerate?

Dear Fellow Managers,

I have an AlphaServer ES40 running Compaq Tru64 UNIX version 4.0F.  The 
file /etc/magic seems corrupt.  How do I regenerate the file?

The reason I suspect the /etc/magic file is corrupt is that the "file" 
command returns several errors before printing any output, and when I 
look at the contents of the file /etc/magic (using the more utility), 
there are about a hundred lines of unrecognisable characters up near the 
beginning of the file.  Also, when I compare the contents of that file 
to a /etc/magic on a known working system, it looks a lot different.

Any help will be highly appreciated.

Yours sincerely,
Robert Honore.