diff --git a/modules/angular2/src/router/route_recognizer.ts b/modules/angular2/src/router/route_recognizer.ts
index d63bbf8079..e3af241502 100644
--- a/modules/angular2/src/router/route_recognizer.ts
+++ b/modules/angular2/src/router/route_recognizer.ts
@@ -52,7 +52,8 @@ export class RouteRecognizer {
 
     if (config instanceof AuxRoute) {
       handler = new SyncRouteHandler(config.component, config.data);
-      let path = config.path.startsWith('/') ? config.path.substring(1) : config.path;
+      let path =
+          StringWrapper.startsWith(config.path, '/') ? config.path.substring(1) : config.path;
       var recognizer = new PathRecognizer(config.path, handler);
       this.auxRoutes.set(path, recognizer);
       return recognizer.terminal;
@@ -140,11 +141,11 @@ export class Redirector {
   toSegments: string[] = [];
 
   constructor(path: string, redirectTo: string) {
-    if (path.startsWith('/')) {
+    if (StringWrapper.startsWith(path, '/')) {
       path = path.substring(1);
     }
     this.segments = path.split('/');
-    if (redirectTo.startsWith('/')) {
+    if (StringWrapper.startsWith(redirectTo, '/')) {
       redirectTo = redirectTo.substring(1);
     }
     this.toSegments = redirectTo.split('/');
diff --git a/modules/angular2/src/router/url_parser.ts b/modules/angular2/src/router/url_parser.ts
index b1f71e8a30..a09f38ecdf 100644
--- a/modules/angular2/src/router/url_parser.ts
+++ b/modules/angular2/src/router/url_parser.ts
@@ -1,5 +1,11 @@
 import {StringMap, StringMapWrapper} from 'angular2/src/core/facade/collection';
-import {isPresent, isBlank, RegExpWrapper, CONST_EXPR} from 'angular2/src/core/facade/lang';
+import {
+  isPresent,
+  isBlank,
+  StringWrapper,
+  RegExpWrapper,
+  CONST_EXPR
+} from 'angular2/src/core/facade/lang';
 import {BaseException, WrappedException} from 'angular2/src/core/facade/exceptions';
 
 /**
@@ -71,10 +77,10 @@ function matchUrlSegment(str: string): string {
 export class UrlParser {
   private _remaining: string;
 
-  peekStartsWith(str: string): boolean { return this._remaining.startsWith(str); }
+  peekStartsWith(str: string): boolean { return StringWrapper.startsWith(this._remaining, str); }
 
   capture(str: string): void {
-    if (!this._remaining.startsWith(str)) {
+    if (!StringWrapper.startsWith(this._remaining, str)) {
       throw new BaseException(`Expected "${str}".`);
     }
     this._remaining = this._remaining.substring(str.length);