--- wrapper/wrapper.cxx.orig	2008-03-20 17:35:37.000000000 +0200
+++ wrapper/wrapper.cxx	2008-03-20 17:35:50.000000000 +0200
@@ -31,6 +31,7 @@
 /* INCLUDE FILES ********************************************************/
 
 #include <ptlib.h>
+#include <ptlib/sound.h>
 #include <h323.h>
 #include <h323pdu.h>
 #include <mediafmt.h>