diff --git a/Library/Homebrew/tap_migrations.rb b/Library/Homebrew/tap_migrations.rb
index e50d639347..bb0acac1b1 100644
--- a/Library/Homebrew/tap_migrations.rb
+++ b/Library/Homebrew/tap_migrations.rb
@@ -135,7 +135,6 @@ TAP_MIGRATIONS = {
   "metalua" => "homebrew/boneyard",
   "mit-scheme" => "homebrew/x11",
   "mlkit" => "homebrew/boneyard",
-  "mlton" => "homebrew/boneyard",
   "morse" => "homebrew/x11",
   "mp3fs" => "homebrew/fuse",
   "mpio" => "homebrew/boneyard",