diff --git a/activemodel/lib/active_model/callbacks.rb b/activemodel/lib/active_model/callbacks.rb
index fde3381df2..ea2ed7dff7 100644
--- a/activemodel/lib/active_model/callbacks.rb
+++ b/activemodel/lib/active_model/callbacks.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "active_support/core_ext/array/extract_options"
+require "active_support/core_ext/hash/keys"
 
 module ActiveModel
   # == Active \Model \Callbacks