diff --git a/apps/bff/src/infra/realtime/realtime.pubsub.ts b/apps/bff/src/infra/realtime/realtime.pubsub.ts
index 6476e326..3a5de007 100644
--- a/apps/bff/src/infra/realtime/realtime.pubsub.ts
+++ b/apps/bff/src/infra/realtime/realtime.pubsub.ts
@@ -1,4 +1,5 @@
-import { Inject, Injectable, Logger, OnModuleDestroy, OnModuleInit } from "@nestjs/common";
+import { Inject, Injectable, Logger } from "@nestjs/common";
+import type { OnModuleDestroy, OnModuleInit } from "@nestjs/common";
 import { Redis } from "ioredis";
 import { getErrorMessage } from "@bff/core/utils/error.util.js";
 import type { RealtimePubSubMessage } from "./realtime.types.js";
diff --git a/apps/bff/src/infra/realtime/realtime.types.ts b/apps/bff/src/infra/realtime/realtime.types.ts
index 37964542..9a548fd8 100644
--- a/apps/bff/src/infra/realtime/realtime.types.ts
+++ b/apps/bff/src/infra/realtime/realtime.types.ts
@@ -1,5 +1,3 @@
-import type { MessageEvent } from "@nestjs/common";
-
 export interface RealtimeEventEnvelope<TEvent extends string = string, TData = unknown> {
   event: TEvent;
   data: TData;
@@ -32,4 +30,5 @@ export interface RealtimeStreamOptions {
   heartbeatEvent?: string | null;
 }
 
-export type RealtimeMessageEvent = MessageEvent<RealtimeEventEnvelope>;
+// Note: NestJS MessageEvent is not a generic type in our setup (verbatimModuleSyntax + current Nest types).
+// Keep this file purely as shared shape definitions.