diff --git a/sw/lib/ocaml/cserial.c b/sw/lib/ocaml/cserial.c
index 35f4ffba60..e245878a71 100644
--- a/sw/lib/ocaml/cserial.c
+++ b/sw/lib/ocaml/cserial.c
@@ -35,7 +35,31 @@
 #include <caml/alloc.h>
 #include <caml/memory.h>
 
-static int baudrates[] = { B0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400, B4800, B9600, B19200, B38400, B57600, B115200, B230400 };
+#include <stropts.h>
+
+static int baudrates[] = {
+    B0,
+    B50,
+    B75,
+    B110,
+    B134,
+    B150,
+    B200,
+    B300,
+    B600,
+    B1200,
+    B1800,
+    B2400,
+    B4800,
+    B9600,
+    B19200,
+    B38400,
+    B57600,
+    B115200,
+    B230400,
+    B921600,
+    B1500000,
+    B3000000 };
 
 
 /****************************************************************************/
diff --git a/sw/lib/ocaml/serial.ml b/sw/lib/ocaml/serial.ml
index 795519cf10..4f94438c02 100644
--- a/sw/lib/ocaml/serial.ml
+++ b/sw/lib/ocaml/serial.ml
@@ -45,6 +45,9 @@ type speed =
   | B57600
   | B115200
   | B230400
+  | B921600
+  | B1500000
+  | B3000000
 
 let speed_of_baudrate = fun baudrate ->
   match baudrate with
@@ -67,6 +70,9 @@ let speed_of_baudrate = fun baudrate ->
     | "57600" -> B57600
     | "115200" -> B115200
     | "230400" -> B230400
+    | "921600" -> B921600
+    | "1500000" -> B1500000
+    | "3000000" -> B3000000
     | _ -> invalid_arg "Serial.speed_of_baudrate"
 
 
diff --git a/sw/lib/ocaml/serial.mli b/sw/lib/ocaml/serial.mli
index 32195ff861..4b2b043436 100644
--- a/sw/lib/ocaml/serial.mli
+++ b/sw/lib/ocaml/serial.mli
@@ -44,6 +44,9 @@ type speed =
   | B57600
   | B115200
   | B230400
+  | B921600
+  | B1500000
+  | B3000000
 
 val speed_of_baudrate : string -> speed