diff --git a/polymer/polymer-tests.ts b/polymer/polymer-tests.ts
index 311fda9676..8a44ed285a 100644
--- a/polymer/polymer-tests.ts
+++ b/polymer/polymer-tests.ts
@@ -63,7 +63,7 @@ var el2 = document.createElement('my-element');
 class MyElement2 {
   is: string;
 
-  registered() {
+  beforeRegister() {
     this.is = "my-element2";
   }
 }
@@ -74,7 +74,7 @@ Polymer(MyElement2);
 class MyElement3 implements polymer.Base {
   is: string;
 
-  registered() {
+  beforeRegister() {
     this.is = "my-element3";
   }
 }
diff --git a/polymer/polymer.d.ts b/polymer/polymer.d.ts
index b764aeb2a8..9117301afd 100644
--- a/polymer/polymer.d.ts
+++ b/polymer/polymer.d.ts
@@ -201,6 +201,8 @@ declare module polymer {
 
     observers?: string[];
 
+    beforeRegister?(): void;
+
     registered?(): void;
 
     created?(): void;