diff --git a/serial_posix.go b/serial_posix.go
index d733f0f..8ac446c 100644
--- a/serial_posix.go
+++ b/serial_posix.go
@@ -37,6 +37,8 @@ func openPort(name string, baud int, databits byte, parity Parity, stopbits Stop
 	}
 	var speed C.speed_t
 	switch baud {
+	case 230400:
+		speed = C.B230400
 	case 115200:
 		speed = C.B115200
 	case 57600: