diff --git a/activesupport/lib/active_support/multibyte/chars.rb b/activesupport/lib/active_support/multibyte/chars.rb
index 7a0e1d458b25e..9a748dfa60944 100644
--- a/activesupport/lib/active_support/multibyte/chars.rb
+++ b/activesupport/lib/active_support/multibyte/chars.rb
@@ -1,4 +1,5 @@
 # encoding: utf-8
+require 'active_support/json'
 require 'active_support/core_ext/string/access'
 require 'active_support/core_ext/string/behavior'
 require 'active_support/core_ext/module/delegation'