NamespaceNode is not defined

[microshine]

https://github.com/yaronn/xpath.js/blob/master/xpath.js#L1887

My code is

select(this.envdoc.documentElement, "namespace::*")

Error log

VM6112:1 Uncaught ReferenceError: NamespaceNode is not defined(…)
(anonymous function) @ VM6112:1
InjectedScript._evaluateOn @ (program):878
InjectedScript._evaluateAndWrap @ (program):811
InjectedScript.evaluateOnCallFrame @ (program):936
PathExpr.evaluate @ xpath.js:1887
XPath.evaluate @ xpath.js:1209
SelectNodes @ xpath.js:4320