diff --git a/ReactiveUI/ContractStubs.cs b/ReactiveUI/ContractStubs.cs
index b764d07b92..fd4d3b4c97 100644
--- a/ReactiveUI/ContractStubs.cs
+++ b/ReactiveUI/ContractStubs.cs
@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Specialized;
 
-#if UIKIT || PORTABLE || WINRT || ANDROID
-
 namespace ReactiveUI
 {
     public class PropertyChangingEventArgs : EventArgs
@@ -25,8 +23,6 @@ public interface INotifyPropertyChanging {
     }
 }
 
-#endif
-
 namespace ReactiveUI
 {    
     public interface INotifyCollectionChanging {