diff --git a/src/core/angularfire2.ts b/src/core/angularfire2.ts
index 01bdb96fe..43c7ce211 100644
--- a/src/core/angularfire2.ts
+++ b/src/core/angularfire2.ts
@@ -7,8 +7,6 @@ import { first } from 'rxjs/operators';
 import firebase from '@firebase/app';
 import { FirebaseApp, FirebaseOptions, FirebaseAppConfig } from '@firebase/app-types';
 
-import {} from 'zone.js';
-
 export const FirebaseAppNameToken = new InjectionToken<string|undefined>('angularfire2.app.name');
 export const FirebaseOptionsToken = new InjectionToken<FirebaseOptions>('angularfire2.app.options');
 export const FirebaseAppConfigToken = new InjectionToken<FirebaseAppConfig|undefined>('angularfire2.app.config');