diff --git a/Library/.rubocop.yml b/Library/.rubocop.yml
index 7039127819..dbff189efd 100644
--- a/Library/.rubocop.yml
+++ b/Library/.rubocop.yml
@@ -33,6 +33,9 @@ FormulaAuditStrict/ComponentsRedundancy:
 FormulaAudit/Homepage:
   Enabled: true
 
+FormulaAudit/LegacyPatches:
+  Enabled: true
+
 # `system` is a special case and aligns on second argument
 Layout/AlignParameters:
   Enabled: false
diff --git a/Library/Homebrew/rubocops.rb b/Library/Homebrew/rubocops.rb
index 4710654fa2..e27f918676 100644
--- a/Library/Homebrew/rubocops.rb
+++ b/Library/Homebrew/rubocops.rb
@@ -6,3 +6,4 @@ require_relative "./rubocops/homepage_cop"
 require_relative "./rubocops/text_cop"
 require_relative "./rubocops/caveats_cop"
 require_relative "./rubocops/checksum_cop"
+require_relative "./rubocops/legacy_patches_cop"