From 3511e3f449357107f9599549438147b2cadbb8e1 Mon Sep 17 00:00:00 2001
From: Jonathan Baudanza <jon@jonb.org>
Date: Sun, 30 Dec 2012 20:21:20 -0800
Subject: Update guides/source/rails_on_rack.md

Rack::Lock actually sets rack.multithread to `false`, not `true`.

Presumably because once inside the mutex, the app can function as if it were single threaded.
---
 guides/source/rails_on_rack.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/guides/source/rails_on_rack.md b/guides/source/rails_on_rack.md
index 1fac6d9883..ac355b4a08 100644
--- a/guides/source/rails_on_rack.md
+++ b/guides/source/rails_on_rack.md
@@ -229,7 +229,7 @@ Much of Action Controller's functionality is implemented as Middlewares. The fol
 
  **`Rack::Lock`**
 
-* Sets `env["rack.multithread"]` flag to `true` and wraps the application within a Mutex.
+* Sets `env["rack.multithread"]` flag to `false` and wraps the application within a Mutex.
 
  **`ActiveSupport::Cache::Strategy::LocalCache::Middleware`**
 
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