diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index 08049d7af8..a0579221c7 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -797,7 +797,7 @@ module ActionController
   #
   #   class PeopleController < ActionController::Base
   #     # Using "Person.create(params[:person])" would raise an
-  #     # ActiveModel::ForbiddenAttributes exception because it'd
+  #     # ActiveModel::ForbiddenAttributesError exception because it'd
   #     # be using mass assignment without an explicit permit step.
   #     # This is the recommended form:
   #     def create
diff --git a/guides/source/action_controller_overview.md b/guides/source/action_controller_overview.md
index 848c9caa59..a906f64633 100644
--- a/guides/source/action_controller_overview.md
+++ b/guides/source/action_controller_overview.md
@@ -203,7 +203,7 @@ predefined raise/rescue flow to end up as a 400 Bad Request.
 
 ```ruby
 class PeopleController < ActionController::Base
-  # This will raise an ActiveModel::ForbiddenAttributes exception
+  # This will raise an ActiveModel::ForbiddenAttributesError exception
   # because it's using mass assignment without an explicit permit
   # step.
   def create