Index: yasr-0.6.9/yasr/tts.c
===================================================================
--- yasr-0.6.9.orig/yasr/tts.c	2008-02-03 00:10:07.000000000 +1100
+++ yasr-0.6.9/yasr/tts.c	2012-02-05 10:59:06.059007839 +1100
@@ -281,6 +281,9 @@
   char *p = synth[tts.synth].unspeakable;
 
   if (ch < 32) return 1;
+  /* characters with high bit set cause DECTALK to crash */
+  if (tts.synth == TTS_DECTALK && ch & 0x80)
+    return 1;
   while (*p)
   {
     if (*p++ == ch) return 1;