diff --git a/Library/Homebrew/debrew/irb.rb b/Library/Homebrew/debrew/irb.rb
index 7087bd8599..4d2f79734d 100644
--- a/Library/Homebrew/debrew/irb.rb
+++ b/Library/Homebrew/debrew/irb.rb
@@ -2,6 +2,7 @@
 
 require "irb"
 
+# @private
 module IRB
   @setup_done = false