diff --git a/src/main/scala/rx/lang/scala/Observable.scala b/src/main/scala/rx/lang/scala/Observable.scala
index ac53ec80..7a94c2ad 100755
--- a/src/main/scala/rx/lang/scala/Observable.scala
+++ b/src/main/scala/rx/lang/scala/Observable.scala
@@ -4435,7 +4435,9 @@ object Observable {
* @param scheduler the Scheduler on which to call `onError`
* @tparam T the type of the items (ostensibly) emitted by the Observable
* @return an Observable that invokes the `Observer`'s `onError` method, on the specified Scheduler
+ * @deprecated use `#subscribeOn` to schedule
*/
+ @deprecated("Use with `error(Throwable).subscribeOn` instead", "0.20")
def error[T](exception: Throwable, scheduler: Scheduler): Observable[T] = {
toScalaObservable[T](rx.Observable.error(exception, scheduler))
}
@@ -4473,7 +4475,9 @@ object Observable {
* specified scheduler
* @see RxJava Wiki: empty()
* @see MSDN: Observable.Empty Method (IScheduler)
+ * @deprecated use `#subscribeOn` to schedule
*/
+ @deprecated("Use `empty.subscribeOn` instead", "0.20")
def empty(scheduler: Scheduler): Observable[Nothing] = {
toScalaObservable(rx.Observable.empty[Nothing](scalaSchedulerToJavaScheduler(scheduler)))
}