diff --git a/Library/.rubocop.yml b/Library/.rubocop.yml
index 744f52c2ee..fe568c15a8 100644
--- a/Library/.rubocop.yml
+++ b/Library/.rubocop.yml
@@ -323,11 +323,6 @@ Lint/DuplicateBranch:
     - "/**/{Formula,Casks}/*.rb"
     - "**/{Formula,Casks}/*.rb"
 
-# needed for lazy_object magic
-Naming/MemoizedInstanceVariableName:
-  Exclude:
-    - "Homebrew/lazy_object.rb"
-
 # useful for metaprogramming in RSpec
 Lint/ConstantDefinitionInBlock:
   Exclude:
diff --git a/Library/Homebrew/lazy_object.rb b/Library/Homebrew/lazy_object.rb
index 550c696387..4dfcbdb4e6 100644
--- a/Library/Homebrew/lazy_object.rb
+++ b/Library/Homebrew/lazy_object.rb
@@ -10,9 +10,11 @@ class LazyObject < Delegator
   end
 
   def __getobj__
+    # rubocop:disable Naming/MemoizedInstanceVariableName
     return @__delegate__ if defined?(@__delegate__)
 
     @__delegate__ = @__callable__.call
+    # rubocop:enable Naming/MemoizedInstanceVariableName
   end
 
   def __setobj__(callable)