diff --git a/Library/Homebrew/cmd/update-report.rb b/Library/Homebrew/cmd/update-report.rb
index 1ab5f39d1a6f454007601aefa568fb07b1ae03b2..57b18b8656e908a6183f6b72fce1597f52ec3c23 100644
--- a/Library/Homebrew/cmd/update-report.rb
+++ b/Library/Homebrew/cmd/update-report.rb
@@ -250,7 +250,7 @@ module Homebrew
       EOS
     end
 
-    Keg::ALL_TOP_LEVEL_DIRECTORIES.each do |dir|
+    (Keg::ALL_TOP_LEVEL_DIRECTORIES + ["Cellar"]).each do |dir|
       FileUtils.mkdir_p "#{HOMEBREW_PREFIX}/#{dir}"
     end