diff --git a/lib/timeout.rb b/lib/timeout.rb
index e293e3b..eb66e58 100644
--- a/lib/timeout.rb
+++ b/lib/timeout.rb
@@ -305,6 +305,7 @@ def self.timeout(sec, klass = nil, message = nil, &block)   #:yield: +sec+
     end
   end
 
+  # See Timeout.timeout
   private def timeout(*args, &block)
     Timeout.timeout(*args, &block)
   end