diff --git a/packages/effect-fc/src/types/SubscriptionSubRef.ts b/packages/effect-fc/src/types/SubscriptionSubRef.ts
index 407d7e3..fead780 100644
--- a/packages/effect-fc/src/types/SubscriptionSubRef.ts
+++ b/packages/effect-fc/src/types/SubscriptionSubRef.ts
@@ -75,7 +75,7 @@ class SubscriptionSubRefImpl<in out A, in out B> extends Effectable.Class<A> imp
 
     modifyEffect<C, E, R>(f: (a: A) => Effect.Effect<readonly [C, A], E, R>): Effect.Effect<C, E, R> {
         return Effect.Do.pipe(
-            Effect.bind("b", () => Ref.get(this.parent)),
+            Effect.bind("b", () => this.parent),
             Effect.bind("ca", ({ b }) => f(this.getter(b))),
             Effect.tap(({ b, ca: [, a] }) => Ref.set(this.parent, this.setter(b, a))),
             Effect.map(({ ca: [c] }) => c),