diff --git a/Library/.rubocop_shared.yml b/Library/.rubocop_shared.yml
index b5912c471d..5c2922e020 100644
--- a/Library/.rubocop_shared.yml
+++ b/Library/.rubocop_shared.yml
@@ -1,3 +1,5 @@
+# TODO: Try getting more rules in sync.
+
 require: ./Homebrew/rubocops.rb
 
 AllCops: