diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index b8620be7f..a2c3c5018 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -649,11 +649,6 @@ Lint/UnifiedInteger:
   Exclude:
     - 'test/unit/query_test.rb'
 
-# Cop supports --auto-correct.
-Lint/UnneededRequireStatement:
-  Exclude:
-    - 'app/models/wiki_page.rb'
-
 # Cop supports --auto-correct.
 # Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
 Lint/UnusedBlockArgument:
diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index 29bc0e5b7..50fbe83c8 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -18,7 +18,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 require 'diff'
-require 'enumerator'
 
 class WikiPage < ActiveRecord::Base
   include Redmine::SafeAttributes