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-rw-r--r--actionpack/lib/action_controller/metal/strong_parameters.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index 11b7919b4b..c3c1921706 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -3,7 +3,7 @@ require 'active_support/core_ext/hash/indifferent_access'
require 'active_support/rescuable'
module ActionController
- class ParameterMissing < IndexError
+ class ParameterMissing < KeyError
attr_reader :param
def initialize(param)