diff --git a/types/sinon-stub-promise/index.d.ts b/types/sinon-stub-promise/index.d.ts
index 10fc8adf4c..2141009456 100644
--- a/types/sinon-stub-promise/index.d.ts
+++ b/types/sinon-stub-promise/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for sinon-stub-promise v1.0.1
+// Type definitions for sinon-stub-promise v1.1.0
 // Project: https://github.com/substantial/sinon-stub-promise
 // Definitions by: Thiago Temple <https://github.com/vintem>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -7,7 +7,7 @@
 /// <reference types="sinon"/>
 
 declare module 'sinon' {
-  interface SinonPromise {
+  interface SinonPromise extends Function {
     resolves(value?: any): void;
     rejects(value?: any): void;
   }