diff --git a/app/serializers/detailed_user_badge_serializer.rb b/app/serializers/detailed_user_badge_serializer.rb
index b32f72b6b85..91c52562dfd 100644
--- a/app/serializers/detailed_user_badge_serializer.rb
+++ b/app/serializers/detailed_user_badge_serializer.rb
@@ -1,5 +1,5 @@
 class DetailedUserBadgeSerializer < BasicUserBadgeSerializer
-  has_one :granted_by
+  has_one :granted_by, serializer: UserBadgeSerializer::UserSerializer
 
   attributes :post_number, :topic_id, :topic_title