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-rw-r--r--activesupport/lib/active_support/per_thread_registry.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/per_thread_registry.rb b/activesupport/lib/active_support/per_thread_registry.rb
index 506dd950cb..a909a65bb6 100644
--- a/activesupport/lib/active_support/per_thread_registry.rb
+++ b/activesupport/lib/active_support/per_thread_registry.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/module/delegation'
+
module ActiveSupport
# This module is used to encapsulate access to thread local variables.
#