diff --git a/lib/rubocop/cop/mixin/index_method.rb b/lib/rubocop/cop/mixin/index_method.rb
index 71f25b9e91..3dea56dd85 100644
--- a/lib/rubocop/cop/mixin/index_method.rb
+++ b/lib/rubocop/cop/mixin/index_method.rb
@@ -119,7 +119,7 @@ def noop_transformation?
       end
 
       # Internal helper class to hold autocorrect data
-      Autocorrection = Struct.new(:match, :block_node, :leading, :trailing) do # rubocop:disable Metrics/BlockLength
+      Autocorrection = Struct.new(:match, :block_node, :leading, :trailing) do
         def self.from_each_with_object(node, match)
           new(match, node, 0, 0)
         end