diff --git a/lib/rubocop/cop/rails/to_s_with_argument.rb b/lib/rubocop/cop/rails/to_s_with_argument.rb
index bb4c967e24..cf04752b6f 100644
--- a/lib/rubocop/cop/rails/to_s_with_argument.rb
+++ b/lib/rubocop/cop/rails/to_s_with_argument.rb
@@ -7,7 +7,7 @@ module Rails
       #
       # @safety
       #   This cop is marked as unsafe because it may detect `#to_s` calls
-      #   that are not related to activesupport implementation.
+      #   that are not related to Active Support implementation.
       #
       # @example
       #