diff --git a/index.js b/index.js
index 873902b..72b0d1d 100644
--- a/index.js
+++ b/index.js
@@ -119,6 +119,8 @@ Q.Promise = QPromise
 
 Q.CancellationError = CancellationError
 
+Q.CancellationState = CancellationState
+
 function AlreadyCancelledFn(){
 	throw new Error('Already cancelled')
 }