diff --git a/lib/action_controller/parameters.rb b/lib/action_controller/parameters.rb
index <HASH>..<HASH> 100644
--- a/lib/action_controller/parameters.rb
+++ b/lib/action_controller/parameters.rb
@@ -1,7 +1,7 @@
 require 'active_support/core_ext/hash/indifferent_access'
 
 module ActionController
-  class ParameterMissing < RuntimeError
+  class ParameterMissing < IndexError
   end
 
   class Parameters < ActiveSupport::HashWithIndifferentAccess
use IndexError to be closer to hash fetch