Wildfly - Cannot get root web context using ServletContext.getContext("/")

[sam.jones]

I am using Wildfly 8.1.0.Final. I need to get a file from the root web context within a servlet. When I try the following line of code:

ServletContext servletContext = this.getServletContext().getContext("/");

The variable servletContext is null.

This worked fine in JBoss AS 7.

Is this a bug or by design? Is there something I can put in standalone.xml?