diff --git a/jquery/jquery-tests.ts b/jquery/jquery-tests.ts
index 29da1c542d..e69795b92b 100644
--- a/jquery/jquery-tests.ts
+++ b/jquery/jquery-tests.ts
@@ -2240,3 +2240,15 @@ $('#item').click(function(e) {
 	if (e.ctrlKey) { console.log('control pressed'); }
 	if (e.altKey) { console.log('alt pressed'); }
 });
+
+function test_addBack() {
+    $('li.third-item').nextAll().addBack().css('background-color', 'red');
+
+    $("div.left, div.right").find("div, div > p").addClass("border");
+
+    // First Example
+    $("div.before-addback").find("p").addClass("background");
+
+    // Second Example
+    $("div.after-addback").find("p").addBack().addClass("background");
+}
\ No newline at end of file
diff --git a/jquery/jquery.d.ts b/jquery/jquery.d.ts
index 0924ce6bb6..9cc0fb9cb5 100644
--- a/jquery/jquery.d.ts
+++ b/jquery/jquery.d.ts
@@ -274,7 +274,10 @@ interface JQueryStatic {
     *******/
     proxy(fn : (...args: any[]) => any, context: any, ...args: any[]): any;
     proxy(context: any, name: string, ...args: any[]): any;
-    Deferred(fn? : (d: JQueryDeferred) => any): JQueryDeferred;
+    Deferred: {
+        (fn?: (d: JQueryDeferred) => any): JQueryDeferred;
+        new(fn?: (d: JQueryDeferred) => any): JQueryDeferred;
+    };
     Event(name:string, eventProperties?:any): JQueryEventObject;
 
     /*********
@@ -371,6 +374,10 @@ interface JQuery {
     addClass(classNames: string): JQuery;
     addClass(func: (index: any, currentClass: any) => string): JQuery;
 
+    // http://api.jquery.com/addBack/
+    addBack(selector?: string): JQuery;
+
+
     attr(attributeName: string): string;
     attr(attributeName: string, value: any): JQuery;
     attr(map: { [key: string]: any; }): JQuery;