--- rdpsnd_libao.c.orig	2010-11-29 14:55:31.124907038 +0100
+++ rdpsnd_libao.c	2010-11-29 14:55:51.708464083 +0100
@@ -76,6 +76,7 @@
 	format.channels = 2;
 	format.rate = 44100;
 	format.byte_format = AO_FMT_NATIVE;
+	format.matrix = NULL;
 
 
 	o_device = ao_open_live(default_driver, &format, NULL);
@@ -115,6 +116,7 @@
 	format.channels = pwfx->nChannels;
 	format.rate = 44100;
 	format.byte_format = AO_FMT_NATIVE;
+	format.matrix = NULL;
 
 	if (o_device != NULL)
 		ao_close(o_device);