diff --git a/railties/lib/initializer.rb b/railties/lib/initializer.rb
index <HASH>..<HASH> 100644
--- a/railties/lib/initializer.rb
+++ b/railties/lib/initializer.rb
@@ -784,7 +784,6 @@ Run `rake gems:install` to install the missing gems.
     def threadsafe!
       self.cache_classes = true
       self.dependency_loading = false
-      self.active_record.allow_concurrency = true
       self.action_controller.allow_concurrency = true
       self
     end
Remove call to active_record.allow_concurrency since it's deprecated