diff --git a/sys/sys/termios.h b/sys/sys/termios.h
index 7e7643fa4f0..1b5150db561 100644
--- a/sys/sys/termios.h
+++ b/sys/sys/termios.h
@@ -230,6 +230,7 @@ struct termios {
 #define B76800	76800
 #define B115200	115200
 #define B230400	230400
+#define B460800	460800
 #define EXTA	19200
 #define EXTB	38400
 #endif  /* !_POSIX_SOURCE */