diff --git a/modules/angular2/src/router/route_registry.ts b/modules/angular2/src/router/route_registry.ts
index 6bf2bd10f7..976903469b 100644
--- a/modules/angular2/src/router/route_registry.ts
+++ b/modules/angular2/src/router/route_registry.ts
@@ -167,7 +167,8 @@ export class RouteRegistry {
     }
 
     if (normalizedLinkParams.length < 2) {
-      throw new BaseException(`Link "${ListWrapper.toJSON(linkParams)}" must include a route name.`);
+      let msg = `Link "${ListWrapper.toJSON(linkParams)}" must include a route name.`;
+      throw new BaseException(msg);
     }
 
     for (let i = 1; i < normalizedLinkParams.length; i += 1) {