diff --git a/src/vs/base/common/timer.ts b/src/vs/base/common/timer.ts
index 6a27ae8225c3051823885d4872e7d2f91c971d3f..762b681dffef367d8ee0dd96cfddeda0ee9faf22 100644
--- a/src/vs/base/common/timer.ts
+++ b/src/vs/base/common/timer.ts
@@ -139,7 +139,7 @@ export interface IEventsListener {
 	(events: ITimerEvent[]): void;
 }
 
-export class TimeKeeper /*extends EventEmitter.EventEmitter*/ {
+export class TimeKeeper {
 	/**
 	 * After being started for 1 minute, all timers are automatically stopped.
 	 */