diff --git a/bluebird/bluebird-tests.ts b/bluebird/bluebird-tests.ts
index b1829c52e..00f6e951f 100644
--- a/bluebird/bluebird-tests.ts
+++ b/bluebird/bluebird-tests.ts
@@ -754,8 +754,8 @@ Promise.longStackTraces();
 
 //TODO enable delay
 
-fooProm = Promise.delay(fooThen, num);
-fooProm = Promise.delay(foo, num);
+fooProm = Promise.delay(num, fooThen);
+fooProm = Promise.delay(num, foo);
 voidProm = Promise.delay(num);
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/bluebird/bluebird.d.ts b/bluebird/bluebird.d.ts
index 023eab7aa..2dfdcf854 100644
--- a/bluebird/bluebird.d.ts
+++ b/bluebird/bluebird.d.ts
@@ -106,8 +106,8 @@ interface PromiseConstructor {
      * Returns a promise that will be fulfilled with `value` (or `undefined`) after given `ms` milliseconds. If `value` is a promise, the delay will start counting down when it is fulfilled and the returned promise will be fulfilled with the fulfillment value of the `value` promise.
      */
     // TODO enable more overloads
-    delay<T>(value: PromiseLike<T>, ms: number): Promise<T>;
-    delay<T>(value: T, ms: number): Promise<T>;
+    delay<T>(ms: number, value: PromiseLike<T>): Promise<T>;
+    delay<T>(ms: number, value: T): Promise<T>;
     delay(ms: number): Promise<void>;
 
     /**