diff --git a/lib/webrick/server.rb b/lib/webrick/server.rb
index b78014c459..2e7654d9bb 100644
--- a/lib/webrick/server.rb
+++ b/lib/webrick/server.rb
@@ -232,7 +232,7 @@ module WEBrick
     def shutdown
       stop
 
-      alarm_shutdown_pipe {|f| f.close}
+      alarm_shutdown_pipe(&:close)
     end
 
     ##