diff --git a/Library/Homebrew/cleaner.rb b/Library/Homebrew/cleaner.rb
index f0c0b35d5b..bbfb240028 100644
--- a/Library/Homebrew/cleaner.rb
+++ b/Library/Homebrew/cleaner.rb
@@ -38,6 +38,7 @@ class Cleaner
 
   # Removes any empty directories in the formula's prefix subtree
   # Keeps any empty directions projected by skip_clean
+  # Removes any unresolved symlinks
   def prune
     dirs = []
     symlinks = []