diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 0a9ecb0..1e46a0f 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@pushrocks/smartpromise',
-  version: '4.0.0',
+  version: '4.0.1',
   description: 'simple promises and Deferred constructs'
 }
diff --git a/ts/smartpromise.classes.deferred.ts b/ts/smartpromise.classes.deferred.ts
index 2984043..1517094 100644
--- a/ts/smartpromise.classes.deferred.ts
+++ b/ts/smartpromise.classes.deferred.ts
@@ -13,6 +13,7 @@ export class Deferred<T> {
   public resolve: IResolve<T>;
   public reject: IReject;
   public status: TDeferredStatus;
+  public claimed = false;
 
   public startedAt: number;
   public stoppedAt: number;