diff --git a/preloadjs/preloadjs.d.ts b/preloadjs/preloadjs.d.ts
index f5904fa8c..142e939b6 100644
--- a/preloadjs/preloadjs.d.ts
+++ b/preloadjs/preloadjs.d.ts
@@ -72,11 +72,18 @@ declare module createjs {
         static version: string;
     }
     
+    /*
+        NOTE: It is commented out because it conflicts with SamplePlugin class of TweenJS.
+              this class is mainly for documentation purposes.
+              http://www.createjs.com/Docs/PreloadJS/classes/SamplePlugin.html
+    */
+    /*
     export class SamplePlugin {
         static fileLoadHandler(event: Object): void;
         static getPreloadHandlers(): Object;
         static preloadHandler(src: string, type: string, id: string, data: any, basePath: string, queue: LoadQueue): any;
     }
+    */
 
     export class TagLoader extends AbstractLoader {
         constructor (item: Object);
diff --git a/tweenjs/tweenjs.d.ts b/tweenjs/tweenjs.d.ts
index a53dd8e20..775a05a20 100644
--- a/tweenjs/tweenjs.d.ts
+++ b/tweenjs/tweenjs.d.ts
@@ -75,6 +75,12 @@ declare module createjs {
         static install(): Object;
     }
 
+    /*
+        NOTE: It is commented out because it conflicts with SamplePlugin Class of PreloadJS.
+              this class is mainly for documentation purposes.
+        http://www.createjs.com/Docs/TweenJS/classes/SamplePlugin.html
+    */
+    /*
     export class SamplePlugin {
         constructor();
 
@@ -87,6 +93,7 @@ declare module createjs {
         static install(): void;
         static tween(tween: Tween, prop: string, value: any, startValues: Object, endValues: Object, ratio: number, wait: boolean, end: boolean): any;
     }
+    */
 
     export class Timeline extends EventDispatcher {
         constructor (tweens: Tween[], labels: Object, props: Object);