'No implicit conversion of Class into String' for inline execution

When running a job inline, within another job, like this

class ParentJob
 def perform
   Resque.inline = true
   ChildJob.create()

A 'No implicit conversion of Class into String' error is thrown from Resque::Job.create(), at this line

https://github.com/resque/resque/blob/da70131fb6d48aa6cb6f58a8a28b9014f620bfb0/lib/resque/job.rb#L93

I see that in the create() method, the klass parameter is explicitly converted to String only when Resque.inline? is false. Shouldn't do that also when executing inline?

Thanks!