diff --git a/packages/backend/src/server/api/endpoints/compatibility/instance-info.ts b/packages/backend/src/server/api/endpoints/compatibility/instance-info.ts
index f416c4b39..f73d8bf82 100644
--- a/packages/backend/src/server/api/endpoints/compatibility/instance-info.ts
+++ b/packages/backend/src/server/api/endpoints/compatibility/instance-info.ts
@@ -181,7 +181,7 @@ const getContact = async (
 		following_count: user.followingCount,
 		statuses_count: user.notesCount,
 		last_status_at: user.lastActiveDate?.toISOString(),
-		emojis: emojis ? user.emojis.filter(e => e in emojis).map(e => ({
+		emojis: emojis ? user.emojis.filter((e, i, a) => e in emojis && a.indexOf(e) == i).map(e => ({
 			shortcode: e,
 			static_url: emojis[e].publicUrl,
 			url: emojis[e].originalUrl,