diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index a9cf1044a9faa929d3a3d24bf91240469917cf23..1db44cde76f61eb729651dd4bb651c47e17d23ff 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3409,6 +3409,8 @@ int uart_get_rs485_mode(struct uart_port *port)
 		port->rs485_term_gpio = NULL;
 		return dev_err_probe(dev, ret, "Cannot get rs485-term-gpios\n");
 	}
+	if (port->rs485_term_gpio)
+		port->rs485_supported.flags |= SER_RS485_TERMINATE_BUS;
 
 	return 0;
 }