NXR search for literal string "sizeof(*"

Hello, NetBSD Techs.

How do I search for the string literal "sizeof(*" (without the
double-quotes) on the NXR cross-reference <http://nxr.netbsd.org/>?

I tried entering the following in the "Full Search" text field against
project "src":

  sizeof\(\*

But it doesn't work; it returns all kinds of results that should not
match.

The equivalent command using grep would be:

  $ grep -FR 'sizeof(*' /usr/src

Thank you!

Lewis