diff --git a/q/Q.d.ts b/q/Q.d.ts
index 1352115e3..3e7371ead 100644
--- a/q/Q.d.ts
+++ b/q/Q.d.ts
@@ -331,8 +331,8 @@ declare module Q {
      */
     export function reject(reason?: any): Promise<any>;
 
-    export function promise<T>(resolver: (resolve: (val: IPromise<T>) => void , reject: (reason: any) => void , notify: (progress: any) => void ) => void ): Promise<T>;
-    export function promise<T>(resolver: (resolve: (val: T) => void , reject: (reason: any) => void , notify: (progress: any) => void ) => void ): Promise<T>;
+    export function Promise<T>(resolver: (resolve: (val: IPromise<T>) => void , reject: (reason: any) => void , notify: (progress: any) => void ) => void ): Promise<T>;
+    export function Promise<T>(resolver: (resolve: (val: T) => void , reject: (reason: any) => void , notify: (progress: any) => void ) => void ): Promise<T>;
 
     /**
      * Creates a new version of func that accepts any combination of promise and non-promise values, converting them to their fulfillment values before calling the original func. The returned version also always returns a promise: if func does a return or throw, then Q.promised(func) will return fulfilled or rejected promise, respectively.