File size error question!

[ly at prism.TMC.COM]

      I have Xenix on an AT clone.

      When I run "fsck /dev/usr",
      I get the message: possible file size error i=552 
      during phase 1 - check blocks and sizes.
      The system does not attempt to fix this error so the message comes up
      every time I run fsck.

      What should I do to get rid of this error?
      Thanks.