diff --git a/lib/rubocop/cop/performance/redundant_match.rb b/lib/rubocop/cop/performance/redundant_match.rb
index e1e4f7b569..4262d8b686 100644
--- a/lib/rubocop/cop/performance/redundant_match.rb
+++ b/lib/rubocop/cop/performance/redundant_match.rb
@@ -56,6 +56,8 @@ def autocorrect(corrector, node)
         # @param [RuboCop::AST::SendNode] node
         # @return [Boolean]
         def autocorrectable?(node)
+          # Regexp#match can take a second argument, but this cop doesn't
+          # register an offense in that case
           node.receiver.regexp_type? || node.first_argument.regexp_type?
         end
       end