diff --git a/extensions/css-language-features/client/src/node/cssClientMain.ts b/extensions/css-language-features/client/src/node/cssClientMain.ts
index 96926979b2a..f634188bedf 100644
--- a/extensions/css-language-features/client/src/node/cssClientMain.ts
+++ b/extensions/css-language-features/client/src/node/cssClientMain.ts
@@ -3,7 +3,6 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { TextDecoder } from 'util';
 import { ExtensionContext, extensions, l10n } from 'vscode';
 import { BaseLanguageClient, LanguageClient, LanguageClientOptions, ServerOptions, TransportKind } from 'vscode-languageclient/node';
 import { LanguageClientConstructor, startClient } from '../cssClient';
diff --git a/extensions/html-language-features/client/src/htmlClient.ts b/extensions/html-language-features/client/src/htmlClient.ts
index 7b69c795f90..6e66f8da288 100644
--- a/extensions/html-language-features/client/src/htmlClient.ts
+++ b/extensions/html-language-features/client/src/htmlClient.ts
@@ -76,7 +76,7 @@ export type LanguageClientConstructor = (name: string, description: string, clie
 export const languageServerDescription = l10n.t('HTML Language Server');
 
 export interface Runtime {
-	TextDecoder: { new(encoding?: string): { decode(buffer: ArrayBuffer): string } };
+	TextDecoder: typeof TextDecoder;
 	fileFs?: FileSystemProvider;
 	telemetry?: TelemetryReporter;
 	readonly timer: {
diff --git a/extensions/html-language-features/client/src/node/htmlClientMain.ts b/extensions/html-language-features/client/src/node/htmlClientMain.ts
index cdb995b3286..1ee0545bc15 100644
--- a/extensions/html-language-features/client/src/node/htmlClientMain.ts
+++ b/extensions/html-language-features/client/src/node/htmlClientMain.ts
@@ -7,7 +7,6 @@ import { getNodeFileFS } from './nodeFs';
 import { Disposable, ExtensionContext, l10n } from 'vscode';
 import { startClient, LanguageClientConstructor, AsyncDisposable } from '../htmlClient';
 import { ServerOptions, TransportKind, LanguageClientOptions, LanguageClient } from 'vscode-languageclient/node';
-import { TextDecoder } from 'util';
 import * as fs from 'fs';
 import TelemetryReporter from '@vscode/extension-telemetry';