diff -ur vorbis-tools-1.2.0.orig/ogg123/speex_format.c vorbis-tools-1.2.0/ogg123/speex_format.c
--- vorbis-tools-1.2.0.orig/ogg123/speex_format.c	2008-03-03 07:37:26.000000000 +0200
+++ vorbis-tools-1.2.0/ogg123/speex_format.c	2008-04-14 16:47:22.000000000 +0300
@@ -475,7 +475,7 @@
            cb->printf_error(callback_arg, ERROR, _("Cannot read header"));
      return NULL;
    }
-   if ((*header)->mode >= SPEEX_NB_MODES) {
+   if ((*header)->mode >= SPEEX_NB_MODES || (*header)->mode < 0) {
      cb->printf_error(callback_arg, ERROR, 
 		      _("Mode number %d does not (any longer) exist in this version"),
 	      (*header)->mode);