diff --git a/drivers/serial/pty.c b/drivers/serial/pty.c
index 35188ef28c..6d1bd5bfc4 100644
--- a/drivers/serial/pty.c
+++ b/drivers/serial/pty.c
@@ -1087,7 +1087,6 @@ int pty_register(int minor)
   devpair->pp_master.pd_master  = true;
   devpair->pp_slave.pd_devpair  = devpair;
 #ifdef CONFIG_SERIAL_TERMIOS
-  devpair->pp_slave.pd_iflag    = ISIG;
   devpair->pp_slave.pd_oflag    = OPOST | ONLCR;
 #endif