diff --git a/app/lib/activitypub/activity/undo.rb b/app/lib/activitypub/activity/undo.rb
index 973143d8d2..eac34efdc9 100644
--- a/app/lib/activitypub/activity/undo.rb
+++ b/app/lib/activitypub/activity/undo.rb
@@ -146,6 +146,7 @@ class ActivityPub::Activity::Undo < ActivityPub::Activity
         if @original_status.account.local?
           forward_for_undo_emoji_reaction
           relay_for_undo_emoji_reaction
+          relay_friend_for_undo_emoji_reaction
         end
       end
     else
@@ -184,6 +185,14 @@ class ActivityPub::Activity::Undo < ActivityPub::Activity
     end
   end
 
+  def relay_friend_for_undo_emoji_reaction
+    return unless @json['signature'].present? && @original_status.distributable_friend?
+
+    ActivityPub::DeliveryWorker.push_bulk(FriendDomain.distributables.pluck(:inbox_url)) do |inbox_url|
+      [Oj.dump(@json), @original_status.account.id, inbox_url]
+    end
+  end
+
   def shortcode
     return @shortcode if defined?(@shortcode)
 
diff --git a/app/services/un_emoji_react_service.rb b/app/services/un_emoji_react_service.rb
index b473d43459..2f9fa169e3 100644
--- a/app/services/un_emoji_react_service.rb
+++ b/app/services/un_emoji_react_service.rb
@@ -52,7 +52,7 @@ class UnEmojiReactService < BaseService
   end
 
   def build_json(emoji_reaction)
-    Oj.dump(serialize_payload(emoji_reaction, ActivityPub::UndoEmojiReactionSerializer))
+    Oj.dump(serialize_payload(emoji_reaction, ActivityPub::UndoEmojiReactionSerializer, signer: emoji_reaction.account))
   end
 
   def render_emoji_reaction(emoji_group)