diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index 1e8763368d..f2e19aa760 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -1148,8 +1148,6 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
                 {
                     _termios_to_termio(tio, args);
                 }
-
-                tio->__c_ispeed = tio->__c_ospeed = cfgetospeed(tio);
             }
             break;
         case TCSETAW:
@@ -1176,8 +1174,7 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
                 if (tio == RT_NULL) return -RT_EINVAL;
 
                 config = serial->config;
-                tio->__c_ispeed = tio->__c_ospeed = cfgetospeed(tio);
-                baudrate = _get_baudrate(tio->__c_ispeed);
+                baudrate = _get_baudrate(cfgetospeed(tio));
                 config.baud_rate = baudrate;
 
                 switch (tio->c_cflag & CSIZE)
diff --git a/components/drivers/serial/serial_tty.c b/components/drivers/serial/serial_tty.c
index d8479aad22..98e7ee652d 100644
--- a/components/drivers/serial/serial_tty.c
+++ b/components/drivers/serial/serial_tty.c
@@ -296,6 +296,7 @@ static int serial_tty_param(struct lwp_tty *tp, struct termios *t)
     RT_ASSERT(softc);
     serial = softc->parent;
 
+    cfsetispeed(t, t->__c_ispeed);
     return rt_device_control(&(serial->parent), TCSETS, t);
 }