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diff --git a/ubi-utils/old-tools/scripts/inject_biterror.pl b/ubi-utils/old-tools/scripts/inject_biterror.pl
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+#!/usr/bin/perl -w
+#
+# 2007 Frank Haverkamp <haver@vnet.ibm.com>
+#
+# Program for bit-error injection. I am sure that perl experts do it
+# in 1 line. Please let me know how it is done right ;-).
+#
+
+use strict;
+use warnings;
+use Getopt::Long;
+use Pod::Usage;
+
+my $i;
+my $help;
+my $result;
+my $offset = 0;
+my $bitmask = 0x01;
+my $in = "input.mif";
+my $out = "output.mif";
+
+$result = GetOptions ("offset=i" => \$offset, # numeric
+ "bitmask=o" => \$bitmask, # numeric
+ "input=s" => \$in, # string
+ "output=s" => \$out, # string
+ "help|?" => \$help) or pod2usage(2);
+
+pod2usage(1) if $help;
+
+my $buf;
+
+open(my $in_fh, "<", $in)
+ or die "Cannot open file $in: $!";
+binmode $in_fh;
+
+open(my $out_fh, ">", $out) or
+ die "Cannot open file $out: $!";
+binmode $out_fh;
+
+$i = 0;
+while (sysread($in_fh, $buf, 1)) {
+
+ $buf = pack('C', unpack('C', $buf) ^ $bitmask) if ($i == $offset);
+ syswrite($out_fh, $buf, 1) or
+ die "Cannot write to offset $offset: $!";
+ $i++;
+}
+
+close $in_fh;
+close $out_fh;
+
+__END__
+
+=head1 NAME
+
+inject_biterrors.pl
+
+=head1 SYNOPSIS
+
+inject_biterror.pl [options]
+
+=head1 OPTIONS
+
+=over 8
+
+=item B<--help>
+
+Print a brief help message and exits.
+
+=item B<--offset>=I<offset>
+
+Byte-offset where bit-error should be injected.
+
+=item B<--bitmask>=I<bitmask>
+
+Bit-mask where to inject errors in the byte.
+
+=item B<--input>=I<input-file>
+
+Input file.
+
+=item B<--output>=I<output-file>
+
+Output file.
+
+=back
+
+=head1 DESCRIPTION
+
+B<inject_biterrors.pl> will read the given input file and inject
+biterrors at the I<offset> specified. The location of the biterrors
+are defined by the I<bitmask> parameter.
+
+=cut