--- lm_sensors-2.8.0/prog/detect/sensors-detect.utf8	2003-07-08 15:07:59.000000000 +0200
+++ lm_sensors-2.8.0/prog/detect/sensors-detect	2003-07-23 12:40:03.000000000 +0200
@@ -1394,7 +1394,7 @@
           "*** Terminating.\n";
     exit(-1);
   }
-  my $towrite = pack "C", $_[1];
+  my $towrite = pack "C", ($_[1] & 0xff);
   sysseek IOPORTS, $_[0], 0 or return -1;
   my $nrchars = syswrite IOPORTS, $towrite, 1;
   return -1 if not defined $nrchars or $nrchars != 1;