diff --git a/.rubocop.yml b/.rubocop.yml
index 978750d..d40eabc 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -16,6 +16,12 @@ Lint/UselessComparison:
   Exclude:
     - 'test/entry_test.rb'
 
+# Rubocop confuses these as instances of "memoization".
+Naming/MemoizedInstanceVariableName:
+  Exclude:
+    - 'lib/zip/extra_field/old_unix.rb'
+    - 'lib/zip/extra_field/unix.rb'
+
 # Allow this multi-line block chain as it actually reads better
 # than the alternatives.
 Style/MultilineBlockChain:
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index df5c84f..47c6e63 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -69,14 +69,6 @@ Naming/BlockParameterName:
     - 'test/output_stream_test.rb'
     - 'test/test_helper.rb'
 
-# Offense count: 2
-# Configuration parameters: EnforcedStyleForLeadingUnderscores.
-# SupportedStylesForLeadingUnderscores: disallowed, required, optional
-Naming/MemoizedInstanceVariableName:
-  Exclude:
-    - 'lib/zip/extra_field/old_unix.rb'
-    - 'lib/zip/extra_field/unix.rb'
-
 # Offense count: 140
 # Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
 # AllowedNames: io, id, to, by, on, in, at, ip, db, os