diff --git a/lib/docs/query.rb b/lib/docs/query.rb
index 03b96b0..39d9a81 100644
--- a/lib/docs/query.rb
+++ b/lib/docs/query.rb
@@ -222,7 +222,10 @@ module Docs
           )
           .joins("LEFT JOIN topics t on t.id = categories.topic_id")
           .select("categories.*, t.slug topic_slug")
-          .index_by(&:id)
+
+      Category.preload_user_fields!(@guardian, categories)
+
+      categories = categories.index_by(&:id)
 
       categories_object = []