diff --git a/extensions/typescript/src/utils/typingsStatus.ts b/extensions/typescript/src/utils/typingsStatus.ts
index b5040086fda08e53db820a34c6cb31abee9be7cf..cd1d7e8e91a91f81237e4fd7ec585d96cc05f5b3 100644
--- a/extensions/typescript/src/utils/typingsStatus.ts
+++ b/extensions/typescript/src/utils/typingsStatus.ts
@@ -11,7 +11,7 @@ import { ITypescriptServiceClient } from '../typescriptService';
 const typingsInstallTimeout = 30 * 1000;
 
 export default class TypingsStatus extends vscode.Disposable {
-	private _acquiringTypings: Map<NodeJS.Timer> = Object.create({});
+	private _acquiringTypings: { [eventId: string]: NodeJS.Timer } = Object.create({});
 	private _client: ITypescriptServiceClient;
 	private _subscriptions: vscode.Disposable[] = [];