diff --git a/ext/ripper/MANIFEST b/ext/ripper/MANIFEST
index fd9caadc31..933e4a11e5 100644
--- a/ext/ripper/MANIFEST
+++ b/ext/ripper/MANIFEST
@@ -6,6 +6,7 @@ eventids2.c
 extconf.rb
 ripper.rb.in
 lib/ripper.rb
+lib/ripper/tokenizer.rb
 test/check-event-arity.rb
 test/check-event-coverage.sh
 test/check-scanner-event-coverage.rb