--- ./options.h.orig	2008-03-02 22:44:57.000000000 +0800
+++ ./options.h	2008-03-02 22:45:04.000000000 +0800
@@ -48,6 +48,7 @@
 #define _CPhone_OPTIONS_H
 
 #include <ptlib.h>
+#include <ptlib/sound.h>
 
 class MainUserInterface;