diff --git a/modules/angular2/src/web_workers/shared/message_bus.ts b/modules/angular2/src/web_workers/shared/message_bus.ts
index 9f64cc50d6..3cf683ee11 100644
--- a/modules/angular2/src/web_workers/shared/message_bus.ts
+++ b/modules/angular2/src/web_workers/shared/message_bus.ts
@@ -79,7 +79,7 @@ export interface MessageBusSink {
 
   /**
    * Assigns this sink to the given zone.
-   * Any channels which are initilialized with runInZone set to true will wait for the given zone
+   * Any channels which are initialized with runInZone set to true will wait for the given zone
    * to exit before sending messages.
    */
   attachToZone(zone: NgZone): void;