diff --git a/RxCocoa/Common/CocoaUnits/Driver/Driver.swift b/RxCocoa/Common/CocoaUnits/Driver/Driver.swift
index 2536d8de..bbd534c2 100644
--- a/RxCocoa/Common/CocoaUnits/Driver/Driver.swift
+++ b/RxCocoa/Common/CocoaUnits/Driver/Driver.swift
@@ -153,7 +153,7 @@ public struct Drive {
 
     @warn_unused_result(message="http://git.io/rxs.uo")
     public static func sequenceOf<E>(elements: E ...) -> Driver<E> {
-        let source = elements.asObservable().subscribeOn(ConcurrentMainScheduler.sharedInstance)
+        let source = elements.toObservable().subscribeOn(ConcurrentMainScheduler.sharedInstance)
         return Driver(raw: source)
     }
     
diff --git a/RxExample/RxExample/Examples/Calculator/CalculatorViewController.swift b/RxExample/RxExample/Examples/Calculator/CalculatorViewController.swift
index b094033e..201e8327 100644
--- a/RxExample/RxExample/Examples/Calculator/CalculatorViewController.swift
+++ b/RxExample/RxExample/Examples/Calculator/CalculatorViewController.swift
@@ -98,7 +98,7 @@ class CalculatorViewController: ViewController {
         ]
         
         commands
-            .asObservable()
+            .toObservable()
             .merge()
             .scan(CLEAR_STATE) { [unowned self] a, x in
                 return self.tranformState(a, x)