error message when connecting to httpd port

when I connect with a browser to the httpd port, I get this error message:
can't read "abspath": no such variable
can't read "abspath": no such variable
    while executing
"PutResponse $token $httpcode $abspath"
    (procedure "Respond" line 82)
    invoked from within
"Respond $token"
    (procedure "::tinyhttpd::Event" line 54)
    invoked from within
"::tinyhttpd::Event ::tinyhttpd::1"

I'm on OpenBSD 4.5, using Coccinella from SVN, Coccinella is installed in /home/user/coccinella/coccinella.
The appended patch to contrib/tinyhttpd.tcl fixes the problem for me, but I am not sure whether this is the right way to fix the problem...