diff --git a/lib/lib.es6.d.ts b/lib/lib.es6.d.ts
index 6c06cc08dc7de..5e11ac89b2e32 100644
--- a/lib/lib.es6.d.ts
+++ b/lib/lib.es6.d.ts
@@ -12066,7 +12066,8 @@ interface ImageData {
 
 declare var ImageData: {
     prototype: ImageData;
-    new(): ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
 }
 
 interface KeyboardEvent extends UIEvent {
diff --git a/lib/lib.webworker.d.ts b/lib/lib.webworker.d.ts
index d9e8a2ab333a1..b2d996f6823e7 100644
--- a/lib/lib.webworker.d.ts
+++ b/lib/lib.webworker.d.ts
@@ -2927,7 +2927,8 @@ interface ImageData {
 
 declare var ImageData: {
     prototype: ImageData;
-    new(): ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
 }
 
 interface MSApp {
@@ -3354,4 +3355,4 @@ declare function postMessage(data: any): void;
 declare var console: Console;
 declare function addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
 declare function addEventListener(type: "message", listener: (ev: MessageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
\ No newline at end of file
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;