diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 166cccf161a8c324feabaf2197d4fa96c3413e44..026f077ee7c6cad6c33a525e170a357e607f8a9b 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -98,7 +98,7 @@ module Dirty
     #   person.name = 'bob'
     #   person.changed? # => true
     def changed?
-      !changed_attributes.empty?
+      changed_attributes.any?
     end
 
     # List of attributes with unsaved changes.