diff --git a/src/remote/activitypub/act/delete/index.ts b/src/remote/activitypub/act/delete/index.ts
index 8163ffc32e..e34577b310 100644
--- a/src/remote/activitypub/act/delete/index.ts
+++ b/src/remote/activitypub/act/delete/index.ts
@@ -1,11 +1,12 @@
 import Resolver from '../../resolver';
 import deleteNote from './note';
 import Post from '../../../../models/post';
+import { IRemoteUser } from '../../../../models/user';
 
 /**
  * 削除アクティビティを捌きます
  */
-export default async (actor, activity): Promise<void> => {
+export default async (actor: IRemoteUser, activity): Promise<void> => {
 	if ('actor' in activity && actor.account.uri !== activity.actor) {
 		throw new Error('invalid actor');
 	}