diff --git a/lib/pleroma/web/mastodon_api/views/instance_view.ex b/lib/pleroma/web/mastodon_api/views/instance_view.ex
index c044aa83a..23647a187 100644
--- a/lib/pleroma/web/mastodon_api/views/instance_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/instance_view.ex
@@ -95,6 +95,7 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       if Config.get([Pleroma.Search, :extensions, :search_option_following], true) do
         "bnakkoma:search_option_following"
       end,
+      "bnakkoma:opensearch_protocol",
       "custom_emoji_reactions",
       "pleroma:get:main/ostatus"
     ]