Function calls are not supported in decorators but 'SignalRModule' was called

[conner-fallone]

Has anyone seen this issue before? We are trying to update to Angular 6.1.10 / rxjs 6.1.0, so we needed to update ng2-signalr to 6.1.0. After doing this, we are having an issue when running ngc

Error during template compile of 'SubscriptionModule'
Function calls are not supported in decorators but 'SignalRModule' was called

SubscriptionModule is our module that is using the SignalRModule. It is specifically the call to .forRoot on the SignalRModule that is causing the problem. Any ideas?