diff --git a/MANIFEST b/MANIFEST
index dcb0263219..52fc272f3b 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -119,6 +119,7 @@ lib/base64.rb
 lib/benchmark.rb
 lib/cgi-lib.rb
 lib/cgi.rb
+lib/cgi/.document
 lib/cgi/session.rb
 lib/cgi/session/pstore.rb
 lib/complex.rb