diff --git a/easeljs/easeljs.d.ts b/easeljs/easeljs.d.ts
index a7fbb9b48..446d33981 100644
--- a/easeljs/easeljs.d.ts
+++ b/easeljs/easeljs.d.ts
@@ -163,12 +163,12 @@ declare module createjs {
         // methods
         addChild<T extends DisplayObject>(child: T): T;
         addChild<T extends DisplayObject>(child0: DisplayObject, lastChild: T): T;
-		addChild<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, lastChild: T): T;
-		addChild<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, child2: DisplayObject, lastChild: T): T;
-		addChild(...children: DisplayObject[]): DisplayObject;
-		addChildAt<T extends DisplayObject>(child: T, index: number): T;
-		addChildAt<T extends DisplayObject>(child0: DisplayObject, lastChild: T, index: number): T;
-		addChildAt<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, lastChild: T, index: number): T;
+        addChild<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, lastChild: T): T;
+        addChild<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, child2: DisplayObject, lastChild: T): T;
+        addChild(...children: DisplayObject[]): DisplayObject;
+        addChildAt<T extends DisplayObject>(child: T, index: number): T;
+        addChildAt<T extends DisplayObject>(child0: DisplayObject, lastChild: T, index: number): T;
+        addChildAt<T extends DisplayObject>(child0: DisplayObject, child1: DisplayObject, lastChild: T, index: number): T;
         addChildAt(...childOrIndex: (DisplayObject|number)[]): DisplayObject; // actually (...child: DisplayObject[], index: number)
 
         clone(recursive?: boolean): Container;