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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
index 0d850c7625..758eedc37d 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
@@ -1,5 +1,5 @@
require 'thread'
-require 'concurrent'
+require 'concurrent/map'
require 'monitor'
module ActiveRecord