diff --git a/Library/Homebrew/cmd/update-report.rb b/Library/Homebrew/cmd/update-report.rb
index 2d6a8f78a6..4de380a772 100644
--- a/Library/Homebrew/cmd/update-report.rb
+++ b/Library/Homebrew/cmd/update-report.rb
@@ -149,6 +149,7 @@ module Homebrew
     else
       ohai "Deleting #{legacy_cache}..."
       FileUtils.rm_rf legacy_cache
+      FileUtils.touch migration_attempted_file if legacy_cache.exist?
     end
   end
 end