diff --git a/src/ng2-page-scroll.directive.ts b/src/ng2-page-scroll.directive.ts
index a2c757a1..7262faf7 100644
--- a/src/ng2-page-scroll.directive.ts
+++ b/src/ng2-page-scroll.directive.ts
@@ -1,5 +1,5 @@
 import {Directive, ElementRef, Input, Output, EventEmitter, HostListener, OnDestroy} from '@angular/core';
-import {Router, NavigationEnd} from '@angular/router';
+import {Router, NavigationEnd, NavigationError, NavigationCancel} from '@angular/router';
 import {Subscription} from 'rxjs/Subscription';
 import {PageScrollConfig, IEasingFunction} from './ng2-page-scroll-config';
 import {PageScrollManager} from './ng2-page-scroll-manager';