$OpenBSD: patch-hardware_arduino_cores_arduino_HardwareSerial_cpp,v 1.1.1.1 2011/09/17 16:41:31 jasper Exp $
--- hardware/arduino/cores/arduino/HardwareSerial.cpp.orig	Mon Jun  6 11:50:40 2011
+++ hardware/arduino/cores/arduino/HardwareSerial.cpp	Mon Jun  6 11:50:56 2011
@@ -24,6 +24,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>
+#include <math.h>
 #include "wiring.h"
 #include "wiring_private.h"
 
