diff --git a/packages/platform/src/internal/worker.ts b/packages/platform/src/internal/worker.ts
index 9e76a48911..23938dfe94 100644
--- a/packages/platform/src/internal/worker.ts
+++ b/packages/platform/src/internal/worker.ts
@@ -1,6 +1,5 @@
 import * as Schema from "@effect/schema/Schema"
 import * as Serializable from "@effect/schema/Serializable"
-import * as Cause from "effect/Cause"
 import * as Channel from "effect/Channel"
 import * as Context from "effect/Context"
 import * as Deferred from "effect/Deferred"
@@ -138,7 +137,7 @@ export const makeManager = Effect.gen(function*() {
                 if (response[1] === 2) {
                   return Deferred.DeferredTypeId in mailbox
                     ? Deferred.fail(mailbox, response[2])
-                    : mailbox.failCause(Cause.fail(response[2]))
+                    : mailbox.fail(response[2])
                 }
                 const cause = WorkerError.decodeCause(response[2])
                 return Deferred.DeferredTypeId in mailbox