$OpenBSD: patch-components_audio_modem_modem_impl_cc,v 1.2 2016/03/06 10:51:14 robert Exp $
--- components/audio_modem/modem_impl.cc.orig.port	Wed Feb 24 00:01:59 2016
+++ components/audio_modem/modem_impl.cc	Thu Mar  3 09:43:26 2016
@@ -10,6 +10,8 @@
 #include <limits>
 #include <vector>
 
+#include <math.h>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
