diff --git a/jquery/jquery.d.ts b/jquery/jquery.d.ts
index 2452ec3773..61fd624422 100644
--- a/jquery/jquery.d.ts
+++ b/jquery/jquery.d.ts
@@ -276,7 +276,15 @@ interface JQueryGenericPromise<T> {
      * @param doneFilter A function that is called when the Deferred is resolved.
      * @param failFilter An optional function that is called when the Deferred is rejected.
      */
-    then<U>(doneFilter: (value: T, ...values: any[]) => U|JQueryPromise<U>, failFilter?: (...reasons: any[]) => U|JQueryPromise<U>, progressFilter?: (...progression: any[]) => any): JQueryPromise<U>;
+    then<U>(doneFilter: (value?: T, ...values: any[]) => U|JQueryPromise<U>, failFilter?: (...reasons: any[]) => any, progressFilter?: (...progression: any[]) => any): JQueryPromise<U>;
+
+    /**
+     * Add handlers to be called when the Deferred object is resolved, rejected, or still in progress.
+     * 
+     * @param doneFilter A function that is called when the Deferred is resolved.
+     * @param failFilter An optional function that is called when the Deferred is rejected.
+     */
+    then(doneFilter: (value?: T, ...values: any[]) => void, failFilter?: (...reasons: any[]) => any, progressFilter?: (...progression: any[]) => any): JQueryPromise<void>;
 }
 
 /**