diff --git a/redux-form/index.d.ts b/redux-form/index.d.ts
index 590fe3a633..f36162d684 100644
--- a/redux-form/index.d.ts
+++ b/redux-form/index.d.ts
@@ -1,6 +1,6 @@
-// Type definitions for redux-form v6.3.1
+// Type definitions for redux-form v6.3.3
 // Project: https://github.com/erikras/redux-form
-// Definitions by: Carson Full <https://github.com/carsonf>, Daniel Lytkin <https://github.com/aikoven>
+// Definitions by: Carson Full <https://github.com/carsonf>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.1
 
diff --git a/redux-form/lib/reduxForm.d.ts b/redux-form/lib/reduxForm.d.ts
index 512797a39c..dc13fa9a9b 100644
--- a/redux-form/lib/reduxForm.d.ts
+++ b/redux-form/lib/reduxForm.d.ts
@@ -48,14 +48,14 @@ export interface Config<FormData extends DataShape, P, S> {
     asyncBlurFields?: string[];
 
     /**
-     * a function that takes all the form values, the dispatch function, and
-     * the props given to your component, and returns a Promise that will
-     * resolve if the validation is passed, or will reject with an object of
-     * validation errors in the form { field1: <String>, field2: <String> }.
+     * a function that takes all the form values, the dispatch function,
+     * the props given to your component and the current blurred field,
+     * and returns a Promise that will resolve if the validation is passed,
+     * or will reject with an object of validation errors in the form { field1: <String>, field2: <String> }.
      *
      * See Asynchronous Blur Validation Example for more details.
      */
-    asyncValidate?(values: FormData, dispatch: Dispatch<S>, props: P): Promise<any>;
+    asyncValidate?(values: FormData, dispatch: Dispatch<S>, props: P, blurredField: string): Promise<any>;
 
     /**
      * Whether or not to automatically destroy your form's state in the Redux