1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/at91_serial.c b/drivers/serial/at91_serial.c
index 54c6b2adf7b7..bf4bf103e5a0 100644
--- a/drivers/serial/at91_serial.c
+++ b/drivers/serial/at91_serial.c
@@ -139,7 +139,7 @@ static void at91_set_mctrl(struct uart_port *port, u_int mctrl)
                  * AT91RM9200 Errata #39: RTS0 is not internally connected to PA21.
                  *  We need to drive the pin manually.
                  */
-                if (port->mapbase == AT91_BASE_US0) {
+                if (port->mapbase == AT91RM9200_BASE_US0) {
                         if (mctrl & TIOCM_RTS)
                                 at91_set_gpio_value(AT91_PIN_PA21, 0);
                         else