diff --git a/modules/angular2/src/change_detection/interfaces.js b/modules/angular2/src/change_detection/interfaces.js
index 5ea6831bc0..684cd2aeaf 100644
--- a/modules/angular2/src/change_detection/interfaces.js
+++ b/modules/angular2/src/change_detection/interfaces.js
@@ -25,6 +25,7 @@ export class ChangeDetector {
   mode:string;
 
   addChild(cd:ChangeDetector) {}
+  addShadowDomChild(cd:ChangeDetector) {}
   removeChild(cd:ChangeDetector) {}
   remove() {}
   hydrate(context:any, locals:Locals, directives:any) {}