1 files changed, 1 insertions, 0 deletions

diff --git a/ext/Setup b/ext/Setup
index 7b214abde3..83ddc13c52 100644
--- a/ext/Setup
+++ b/ext/Setup
@@ -21,6 +21,7 @@
 #openssl
 #racc/cparse
 #readline
+#ripper
 #sdbm
 #socket
 #stringio