diff --git a/packages/conform-dom/form.ts b/packages/conform-dom/form.ts
index fd09f0642..8d4d80059 100644
--- a/packages/conform-dom/form.ts
+++ b/packages/conform-dom/form.ts
@@ -58,14 +58,9 @@ export type DefaultValue<Schema> = Schema extends
 	? { [Key in keyof Schema]?: DefaultValue<Schema[Key]> } | null | undefined
 	: string | null | undefined;
 
-export type FormValue<Schema> = Schema extends
-	| string
-	| number
-	| boolean
-	| Date
-	| bigint
-	| null
-	| undefined
+export type FormValue<Schema> = Schema extends string
+	? Schema | undefined
+	: Schema extends number | boolean | Date | bigint | null | undefined
 	? string | undefined
 	: Schema extends File
 	? File | undefined