diff --git a/redux-form/lib/reduxForm.d.ts b/redux-form/lib/reduxForm.d.ts
index bcfafe2e3a..100a708032 100644
--- a/redux-form/lib/reduxForm.d.ts
+++ b/redux-form/lib/reduxForm.d.ts
@@ -30,7 +30,7 @@ export interface Config<FormData extends DataShape, P, S> {
      * the name of your form and the key to where your form's state will be
      * mounted under the redux-form reducer
      */
-    form: string;
+    form?: string;
 
     /**
      * An adapter function that will render a component based on a string component
diff --git a/redux-form/redux-form-tests.tsx b/redux-form/redux-form-tests.tsx
index f37e1e9815..396ca8df85 100644
--- a/redux-form/redux-form-tests.tsx
+++ b/redux-form/redux-form-tests.tsx
@@ -57,7 +57,8 @@ reduxForm({
     form: 'mySFCForm'
 })(MyStatelessFunctionalComponent);
 
-class MyReusableForm extends Component<void, undefined> {
+@reduxForm<FormData, any, any>({})
+class MyDynamicForm extends Component<void, undefined> {
     render() {
         return (
             <div>