diff --git a/packages/backend/src/server/api/mastodon/endpoints/status.ts b/packages/backend/src/server/api/mastodon/endpoints/status.ts
index 20401437e..3cf442f11 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/status.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/status.ts
@@ -219,7 +219,7 @@ export class ApiStatusMastodon {
 			const client = getClient(BASE_URL, accessTokens);
 			const body: any = _request.body;
 			try {
-				if (body.media_ids) body.media_ids = undefined;
+				if (!body.media_ids) body.media_ids = undefined;
 				if (body.media_ids && !body.media_ids.length) body.media_ids = undefined;
 				if (body.media_ids) {
 					body.media_ids = (body.media_ids as string[]).map((p) => convertId(p, IdType.SharkeyId));
diff --git a/packages/megalodon/src/misskey.ts b/packages/megalodon/src/misskey.ts
index 9807f0cc7..787048830 100644
--- a/packages/megalodon/src/misskey.ts
+++ b/packages/megalodon/src/misskey.ts
@@ -1155,12 +1155,10 @@ export default class Misskey implements MegalodonInterface {
       text: _options.status
     }
     if (_options) {
-      if (_options.media_ids && _options.media_ids.length > 0) {
+      if (_options.media_ids) {
         params = Object.assign(params, {
           fileIds: _options.media_ids
         })
-      } else {
-        _options.media_ids = null;
       }
       if (_options.poll) {
         let pollParam = {