diff --git a/packages/backend/src/server/api/mastodon/endpoints/list.ts b/packages/backend/src/server/api/mastodon/endpoints/list.ts
index 92ed31044..053f617a8 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/list.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/list.ts
@@ -9,6 +9,7 @@ import { PaginationHelpers } from "@/server/api/mastodon/helpers/pagination.js";
 import { UserLists } from "@/models/index.js";
 import { NoteHelpers } from "@/server/api/mastodon/helpers/note.js";
 import { getUser } from "@/server/api/common/getters.js";
+import { toArray } from "@/prelude/array.js";
 
 export function setupEndpointsList(router: Router): void {
     router.get("/v1/lists", async (ctx, reply) => {
@@ -192,7 +193,7 @@ export function setupEndpointsList(router: Router): void {
                     return;
                 }
 
-                const ids = NoteHelpers.normalizeToArray(body['account_ids']).map(p => convertId(p, IdType.IceshrimpId));
+                const ids = toArray(body['account_ids']).map(p => convertId(p, IdType.IceshrimpId));
                 const targets = await Promise.all(ids.map(p => getUser(p)));
                 await ListHelpers.addToList(user, list, targets);
                 ctx.body = {}
@@ -229,7 +230,7 @@ export function setupEndpointsList(router: Router): void {
                     return;
                 }
 
-                const ids = NoteHelpers.normalizeToArray(body['account_ids']).map(p => convertId(p, IdType.IceshrimpId));
+                const ids = toArray(body['account_ids']).map(p => convertId(p, IdType.IceshrimpId));
                 const targets = await Promise.all(ids.map(p => getUser(p)));
                 await ListHelpers.removeFromList(user, list, targets);
                 ctx.body = {}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/status.ts b/packages/backend/src/server/api/mastodon/endpoints/status.ts
index 4d0eb8bcd..776de78a6 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/status.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/status.ts
@@ -13,6 +13,7 @@ import { Cache } from "@/misc/cache.js";
 import AsyncLock from "async-lock";
 import { ILocalUser } from "@/models/entities/user.js";
 import { PollHelpers } from "@/server/api/mastodon/helpers/poll.js";
+import { toArray } from "@/prelude/array.js";
 
 const postIdempotencyCache = new Cache<{ status?: MastodonEntity.Status }>('postIdempotencyCache', 60 * 60);
 const postIdempotencyLocks = new AsyncLock();
@@ -640,7 +641,7 @@ export function setupEndpointsStatus(router: Router): void {
                 }
 
                 const body: any = ctx.request.body;
-                const choices = NoteHelpers.normalizeToArray(body.choices ?? []).map(p => parseInt(p));
+                const choices = toArray(body.choices ?? []).map(p => parseInt(p));
                 if (choices.length < 1) {
                     ctx.status = 400;
                     ctx.body = {error: 'Must vote for at least one option'};
diff --git a/packages/backend/src/server/api/mastodon/helpers/note.ts b/packages/backend/src/server/api/mastodon/helpers/note.ts
index 340846743..a81a88385 100644
--- a/packages/backend/src/server/api/mastodon/helpers/note.ts
+++ b/packages/backend/src/server/api/mastodon/helpers/note.ts
@@ -23,6 +23,7 @@ import { VisibilityConverter } from "@/server/api/mastodon/converters/visibility
 import mfm from "mfm-js";
 import { FileConverter } from "@/server/api/mastodon/converters/file.js";
 import { MfmHelpers } from "@/server/api/mastodon/helpers/mfm.js";
+import { toArray } from "@/prelude/array.js";
 
 export class NoteHelpers {
     public static async getDefaultReaction(): Promise<string> {
@@ -331,7 +332,7 @@ export class NoteHelpers {
             result.in_reply_to_id = convertId(body.in_reply_to_id, IdType.IceshrimpId);
         if (body.media_ids)
             result.media_ids = body.media_ids && body.media_ids.length > 0
-                ? this.normalizeToArray(body.media_ids)
+                ? toArray(body.media_ids)
                     .map(p => convertId(p, IdType.IceshrimpId))
                 : undefined;
 
@@ -359,7 +360,7 @@ export class NoteHelpers {
             result.language = body.language;
         if (body.media_ids)
             result.media_ids = body.media_ids && body.media_ids.length > 0
-                ? this.normalizeToArray(body.media_ids)
+                ? toArray(body.media_ids)
                     .map(p => convertId(p, IdType.IceshrimpId))
                 : undefined;
 
@@ -375,8 +376,4 @@ export class NoteHelpers {
 
         return result;
     }
-
-    public static normalizeToArray<T>(subject: T | T[]) {
-        return Array.isArray(subject) ? subject : [subject];
-    }
 }