diff --git a/es6-promises/es6-promises.d.ts b/es6-promises/es6-promises.d.ts
index a44355233..a50cd1fc6 100644
--- a/es6-promises/es6-promises.d.ts
+++ b/es6-promises/es6-promises.d.ts
@@ -5,10 +5,10 @@
 
 
 interface Thenable<R> {
-	then<U>(onFulfill: (value: R) => Thenable<U>,  onReject: (error: any) => Thenable<U>): Thenable<U>;
-    then<U>(onFulfill: (value: R) => Thenable<U>, onReject?: (error: any) => U): Thenable<U>;
-    then<U>(onFulfill: (value: R) => U, onReject: (error: any) => Thenable<U>): Thenable<U>;
-    then<U>(onFulfill?: (value: R) => U, onReject?: (error: any) => U): Thenable<U>;
+    then<U>(onFulfilled: (value: R) => Thenable<U>,  onRejected: (error: any) => Thenable<U>): Thenable<U>;
+    then<U>(onFulfilled: (value: R) => Thenable<U>, onRejected?: (error: any) => U): Thenable<U>;
+    then<U>(onFulfilled: (value: R) => U, onRejected: (error: any) => Thenable<U>): Thenable<U>;
+    then<U>(onFulfilled?: (value: R) => U, onRejected?: (error: any) => U): Thenable<U>;
 	
 }
 
@@ -130,4 +130,4 @@ declare module Promise {
      * Make a Promise that fulfills when any item fulfills, and rejects if any item rejects.
      */
 	function race<R>(promises: Promise<R>[]): Promise<R>;
-}
\ No newline at end of file
+}