diff --git a/lib/lib.dom.d.ts b/lib/lib.dom.d.ts
index 920c0ad2dae17..d61995862ea62 100644
--- a/lib/lib.dom.d.ts
+++ b/lib/lib.dom.d.ts
@@ -5322,7 +5322,7 @@ interface FileReader extends EventTarget {
     readAsArrayBuffer(blob: Blob): void;
     readAsBinaryString(blob: Blob): void;
     readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, label?: string): void;
+    readAsText(blob: Blob, encoding?: string): void;
     readonly DONE: number;
     readonly EMPTY: number;
     readonly LOADING: number;
diff --git a/lib/lib.webworker.d.ts b/lib/lib.webworker.d.ts
index 0c13cc8a5553f..c7eeaa43c5872 100644
--- a/lib/lib.webworker.d.ts
+++ b/lib/lib.webworker.d.ts
@@ -950,7 +950,7 @@ interface FileReader extends EventTarget {
     readAsArrayBuffer(blob: Blob): void;
     readAsBinaryString(blob: Blob): void;
     readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, label?: string): void;
+    readAsText(blob: Blob, encoding?: string): void;
     readonly DONE: number;
     readonly EMPTY: number;
     readonly LOADING: number;
@@ -972,7 +972,7 @@ interface FileReaderSync {
     readAsArrayBuffer(blob: Blob): ArrayBuffer;
     readAsBinaryString(blob: Blob): string;
     readAsDataURL(blob: Blob): string;
-    readAsText(blob: Blob, label?: string): string;
+    readAsText(blob: Blob, encoding?: string): string;
 }
 
 declare var FileReaderSync: {