diff --git a/packages/react/src/useForm.ts b/packages/react/src/useForm.ts
index 0e0188e60..4517ac490 100644
--- a/packages/react/src/useForm.ts
+++ b/packages/react/src/useForm.ts
@@ -6,7 +6,7 @@ import useRemember from './useRemember'
 type setDataByObject<TForm> = (data: TForm) => void
 type setDataByMethod<TForm> = (data: (previousData: TForm) => TForm) => void
 type setDataByKeyValuePair<TForm> = <K extends keyof TForm>(key: K, value: TForm[K]) => void
-type FormDataType = Record<string, FormDataConvertible>
+type FormDataType = Partial<Record<string, FormDataConvertible>>
 type FormOptions = Omit<VisitOptions, 'data'>
 
 export interface InertiaFormProps<TForm extends FormDataType> {