diff --git a/packages/backend/src/remote/activitypub/kernel/like.ts b/packages/backend/src/remote/activitypub/kernel/like.ts
index 76272eea7..9650312b3 100644
--- a/packages/backend/src/remote/activitypub/kernel/like.ts
+++ b/packages/backend/src/remote/activitypub/kernel/like.ts
@@ -11,7 +11,7 @@ export default async (actor: CacheableRemoteUser, activity: ILike) => {
 
 	await extractEmojis(activity.tag || [], actor.host).catch(() => null);
 
-	return await createReaction(actor, note, activity._misskey_reaction || activity.content || activity.name).catch(e => {
+	return await createReaction(actor, note, activity.content || activity.name).catch(e => {
 		if (e.id === '51c42bb4-931a-456b-bff7-e5a8a70dd298') {
 			return 'skip: already reacted';
 		} else {
diff --git a/packages/backend/src/remote/activitypub/renderer/index.ts b/packages/backend/src/remote/activitypub/renderer/index.ts
index 8ec9f7ade..0ea143cda 100644
--- a/packages/backend/src/remote/activitypub/renderer/index.ts
+++ b/packages/backend/src/remote/activitypub/renderer/index.ts
@@ -36,7 +36,6 @@ export const renderActivity = (x: any): IActivity | null => {
 				// Misskey
 				misskey: 'https://misskey-hub.net/ns#',
 				'_misskey_quote': 'misskey:_misskey_quote',
-				'_misskey_reaction': 'misskey:_misskey_reaction',
 				'_misskey_votes': 'misskey:_misskey_votes',
 				'_misskey_talk': 'misskey:_misskey_talk',
 				'isCat': 'misskey:isCat',
diff --git a/packages/backend/src/remote/activitypub/renderer/like.ts b/packages/backend/src/remote/activitypub/renderer/like.ts
index 3978bc961..a52d9c706 100644
--- a/packages/backend/src/remote/activitypub/renderer/like.ts
+++ b/packages/backend/src/remote/activitypub/renderer/like.ts
@@ -14,7 +14,6 @@ export const renderLike = async (noteReaction: NoteReaction, note: Note) => {
 		actor: `${config.url}/users/${noteReaction.userId}`,
 		object: note.uri ? note.uri : `${config.url}/notes/${noteReaction.noteId}`,
 		content: reaction,
-		_misskey_reaction: reaction,
 	} as any;
 
 	if (reaction.startsWith(':')) {
diff --git a/packages/backend/src/remote/activitypub/type.ts b/packages/backend/src/remote/activitypub/type.ts
index 28868297d..a14133ddc 100644
--- a/packages/backend/src/remote/activitypub/type.ts
+++ b/packages/backend/src/remote/activitypub/type.ts
@@ -282,7 +282,7 @@ export interface IRemove extends IActivity {
 
 export interface ILike extends IActivity {
 	type: 'Like' | 'EmojiReaction' | 'EmojiReact';
-	_misskey_reaction?: string;
+	content?: string;
 }
 
 export interface IAnnounce extends IActivity {