1 files changed, 1 insertions, 0 deletions

diff --git a/ext/Setup b/ext/Setup
index 9e3a2474c3..6373af370d 100644
--- a/ext/Setup
+++ b/ext/Setup
@@ -7,6 +7,7 @@
 #fcntl
 #kconv
 #md5
+#pty
 #socket
 #tkutil
 #tcltklib