diff --git a/modules/angular2/traceur-runtime.d.ts b/modules/angular2/traceur-runtime.d.ts
index 7429ea76b6..2b151029cb 100644
--- a/modules/angular2/traceur-runtime.d.ts
+++ b/modules/angular2/traceur-runtime.d.ts
@@ -45,6 +45,7 @@ interface Map<K, V> {
   size: number;
 }
 declare var Map: {
+  new (): Map<any, any>;
   new<K, V>(): Map<K, V>;
   // alexeagle: PATCHED
   new<K, V>(m: Map<K, V>): Map<K, V>;
@@ -61,6 +62,7 @@ interface Set<T> {
   size: number;
 }
 declare var Set: {
+  new (): Set<any>;
   new<T>(): Set<T>;
   // alexeagle PATCHED
   new<T>(s: Set<T>): Set<T>;