diff --git a/lib/lib.dom.d.ts b/lib/lib.dom.d.ts
index 7817a0e426704..255f7d6dd4853 100644
--- a/lib/lib.dom.d.ts
+++ b/lib/lib.dom.d.ts
@@ -5233,12 +5233,12 @@ interface FileReaderEventMap {
 /** The FileReader object lets web applications asynchronously read the contents of files (or raw data buffers) stored on the user's computer, using File or Blob objects to specify the file or data to read. */
 interface FileReader extends EventTarget {
     readonly error: DOMException | null;
-    onabort: ((this: FileReader, ev: ProgressEvent) => any) | null;
-    onerror: ((this: FileReader, ev: ProgressEvent) => any) | null;
-    onload: ((this: FileReader, ev: ProgressEvent) => any) | null;
-    onloadend: ((this: FileReader, ev: ProgressEvent) => any) | null;
-    onloadstart: ((this: FileReader, ev: ProgressEvent) => any) | null;
-    onprogress: ((this: FileReader, ev: ProgressEvent) => any) | null;
+    onabort: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
+    onerror: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
+    onload: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
+    onloadend: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
+    onloadstart: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
+    onprogress: ((this: FileReader, ev: FileReaderProgressEvent) => any) | null;
     readonly readyState: number;
     readonly result: string | ArrayBuffer | null;
     abort(): void;
@@ -5263,6 +5263,10 @@ declare var FileReader: {
     readonly LOADING: number;
 };
 
+interface FileReaderProgressEvent extends ProgressEvent {
+    readonly target: FileReader | null;
+}
+
 /** The FocusEvent interface represents focus-related events like focus, blur, focusin, or focusout. */
 interface FocusEvent extends UIEvent {
     readonly relatedTarget: EventTarget;