diff --git a/slickgrid/slick.headerbuttons.d.ts b/slickgrid/slick.headerbuttons.d.ts
index c4d928777f..9ac7f86db3 100644
--- a/slickgrid/slick.headerbuttons.d.ts
+++ b/slickgrid/slick.headerbuttons.d.ts
@@ -1,6 +1,13 @@
+// Type definitions for SlickGrid HeaderButtons Plugin 2.1.0
+// Project: https://github.com/mleibman/SlickGrid
+// Definitions by: Derek Cicerone <https://github.com/derekcicerone/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="SlickGrid.d.ts" />
+
 declare module Slick {
 
-    export interface Column<T extends Slick.SlickData> {
+    export interface Column<T extends SlickData> {
         header: Header;
     }
 
@@ -19,9 +26,9 @@ declare module Slick {
 
     export module Plugins {
 
-        export class HeaderButtons<T extends Slick.SlickData> extends Plugin<T> {
+        export class HeaderButtons<T extends SlickData> extends Plugin<T> {
             constructor();
-            public onCommand: Slick.Event<any>;
+            public onCommand: Event<any>;
         }
     }
 }