diff --git a/activesupport/lib/active_support/cache/strategy/local_cache.rb b/activesupport/lib/active_support/cache/strategy/local_cache.rb
index e9ee98a128041f4ba6c8ef0e07cff789fce9a559..73c6b3cb889938bda57370e157d3a46944268ee9 100644
--- a/activesupport/lib/active_support/cache/strategy/local_cache.rb
+++ b/activesupport/lib/active_support/cache/strategy/local_cache.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/object/duplicable'
 require 'active_support/core_ext/string/inflections'
+require 'active_support/per_thread_registry'
 
 module ActiveSupport
   module Cache