Filters not firing for welcome-file

I have a gzip filter setup to run on <url-pattern>*.html</url-pattern> and <welcome-file>index.html</welcome-file>.  When I request http://localhost:8080/ jetty serves up index.html with out running the gzip filter.

Since there is not .html in the url http://localhost:8080/ I can understand why it doesn't run.  So my question is what url-pattern can I use to match whatever the welcome-file is?

Thanks!
Steve