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diff --git a/lib/Lintian/Index/Strings.pm b/lib/Lintian/Index/Strings.pm
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+# -*- perl -*- Lintian::Index::Strings
+#
+# Copyright (C) 2020 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package Lintian::Index::Strings;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use Path::Tiny;
+use Unicode::UTF8 qw(decode_utf8);
+
+use Lintian::IPC::Run3 qw(safe_qx);
+
+use Moo::Role;
+use namespace::clean;
+
+const my $EMPTY => q{};
+
+=head1 NAME
+
+Lintian::Index::Strings - strings in binary files.
+
+=head1 SYNOPSIS
+
+    use Lintian::Index;
+
+=head1 DESCRIPTION
+
+Lintian::Index::Strings strings in binary files.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item add_strings
+
+=cut
+
+sub add_strings {
+    my ($self) = @_;
+
+    my $errors = $EMPTY;
+
+    my @files = grep { $_->is_file } @{$self->sorted_list};
+    for my $file (@files) {
+
+        next
+          if $file->name =~ m{^usr/lib/debug/};
+
+        # skip non-binaries
+        next
+          unless $file->file_type =~ /\bELF\b/;
+
+        # prior implementations sometimes made the list unique
+        my $allstrings
+          = decode_utf8(safe_qx(qw{strings --all --}, $file->unpacked_path));
+
+        $file->strings($allstrings);
+    }
+
+    return $errors;
+}
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for
+Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et