diff --git a/lib/puma/configuration.rb b/lib/puma/configuration.rb
index 116ded2815..a9ca86550b 100644
--- a/lib/puma/configuration.rb
+++ b/lib/puma/configuration.rb
@@ -183,7 +183,8 @@ def default_options
         :environment => lambda { ENV['RACK_ENV'] || "development" },
         :rackup => DefaultRackup,
         :logger => STDOUT,
-        :persistent_timeout => Const::PERSISTENT_TIMEOUT
+        :persistent_timeout => Const::PERSISTENT_TIMEOUT,
+        :first_data_timeout => Const::FIRST_DATA_TIMEOUT
       }
     end