diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 48dd54a7b0..f57588b96d 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -86,9 +86,9 @@ module ActiveModel
   #
   # If an attribute is modified in-place then make use of
   # +[attribute_name]_will_change!+ to mark that the attribute is changing.
-  # Otherwise ActiveModel can't track changes to in-place attributes. Note
-  # that ActiveRecord can detect in-place modifications automatically. You do
-  # not need to call +[attribute_name]_will_change!+ on ActiveRecord models.
+  # Otherwise Active Model can't track changes to in-place attributes. Note
+  # that Active Record can detect in-place modifications automatically. You do
+  # not need to call +[attribute_name]_will_change!+ on Active Record models.
   #
   #   person.name_will_change!
   #   person.name_change    # => ["Bill", "Bill"]