--- a/Implab/SyncContextPromise.cs	Mon Feb 16 17:48:39 2015 +0300
+++ b/Implab/SyncContextPromise.cs	Tue Feb 17 18:16:26 2015 +0300
@@ -1,4 +1,5 @@
 using System.Threading;
+using System;
 
 namespace Implab {
     public class SyncContextPromise<T> : Promise<T> {
@@ -13,12 +14,12 @@
             m_context.Post(x => base.SignalSuccess(handler), null);
         }
 
-        protected override void SignalError(IDeferred<T> handler, System.Exception error) {
+        protected override void SignalError(IDeferred<T> handler, Exception error) {
             m_context.Post(x => base.SignalError(handler, error), null);
         }
 
-        protected override void SignalCancelled(IDeferred<T> handler) {
-            m_context.Post(x => base.SignalCancelled(handler), null);
+        protected override void SignalCancelled(IDeferred<T> handler, Exception reason) {
+            m_context.Post(x => base.SignalCancelled(handler, reason), null);
         }
     }
 }