Injecting JsonP without using it causes hang

I’m seeing an odd situation. If I simply inject Jsonp like this:

  constructor(private nav: NavController, navParams: NavParams, 
    public jsonp: Jsonp, public http: Http) {
  	// TODO This should be handled with an Observable stream (Reative). For now
  	// just play the first one

  	this.program = navParams.get('program');

then the console.log command never displays. If I simply remove jsonp, then it does. Note that I’m not even using jsonp anywhere in my app: simply injecting it seems to be causing a hang, which is really odd. Thoughts?