diff --git a/packages/effect-fc/src/Memoized.ts b/packages/effect-fc/src/Memoized.ts
index bcffed0..7176643 100644
--- a/packages/effect-fc/src/Memoized.ts
+++ b/packages/effect-fc/src/Memoized.ts
@@ -7,7 +7,9 @@ import type * as Component from "./Component.js"
 export const MemoizedTypeId: unique symbol = Symbol.for("@effect-fc/Memoized/Memoized")
 export type MemoizedTypeId = typeof MemoizedTypeId
 
-export interface Memoized<P> extends MemoizedOptions<P> {
+export interface Memoized<P> extends MemoizedPrototype, MemoizedOptions<P> {}
+
+export interface MemoizedPrototype {
     readonly [MemoizedTypeId]: MemoizedTypeId
 }
 
@@ -16,7 +18,7 @@ export interface MemoizedOptions<P> {
 }
 
 
-export const MemoizedPrototype = Object.freeze({
+export const MemoizedPrototype: MemoizedPrototype = Object.freeze({
     [MemoizedTypeId]: MemoizedTypeId,
 
     transformFunctionComponent<P extends {}>(