--- apps/app_alarmreceiver.c.orig	2012-02-28 15:39:49.000000001 +1100
+++ apps/app_alarmreceiver.c	2012-02-28 15:40:22.000000001 +1100
@@ -201,6 +201,7 @@
 			wf.data.ptr = tone_block.buf;
 			wf.datalen = f->datalen;
 			wf.samples = wf.datalen;
+			wf.src = "";
 			
 			make_tone_burst(tone_block.buf, freq, (float) tldn, wf.datalen, &x);