1 files changed, 5 insertions, 4 deletions
diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb
index a3545f1d53..73cee9b88f 100644
--- a/activemodel/lib/active_model.rb
+++ b/activemodel/lib/active_model.rb
@@ -27,12 +27,13 @@ require 'active_support'
 
 module ActiveModel
   autoload :Base, 'active_model/base'
-  autoload :Observing, 'active_model/observing'
-  autoload :Validations, 'active_model/validations'
-  autoload :Errors, 'active_model/errors'
   autoload :DeprecatedErrorMethods, 'active_model/deprecated_error_methods'
-  autoload :TestCase, 'active_model/test_case'
+  autoload :Errors, 'active_model/errors'
+  autoload :Observer, 'active_model/observing'
+  autoload :Observing, 'active_model/observing'
   autoload :StateMachine, 'active_model/state_machine'
+  autoload :TestCase, 'active_model/test_case'
+  autoload :Validations, 'active_model/validations'
   autoload :ValidationsRepairHelper, 'active_model/validations_repair_helper'
 end