diff --git a/packages/effect-fc/src/SynchronizedForm.ts b/packages/effect-fc/src/SynchronizedForm.ts
index 71236f6..034b5c2 100644
--- a/packages/effect-fc/src/SynchronizedForm.ts
+++ b/packages/effect-fc/src/SynchronizedForm.ts
@@ -135,7 +135,7 @@ export declare namespace make {
     export interface Options<in out A, in out I = A, in out R = never, in out TER = never, in out TEW = never, in out TRR = never, in out TRW = never> {
         readonly schema: Schema.Schema<A, I, R>
         readonly target: Lens.Lens<A, TER, TEW, TRR, TRW>
-        readonly initialEncodedValue: NoInfer<I>
+        readonly initialEncodedValue?: NoInfer<I>
     }
 }