diff --git a/lib/tagger.rb b/lib/tagger.rb
index 43a40e4..67ec463 100644
--- a/lib/tagger.rb
+++ b/lib/tagger.rb
@@ -1,74 +1,74 @@
 # frozen_string_literal: true
 #
 # Copyright (C) 2018 Harald Sitter <sitter@kde.org>
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
 # License as published by the Free Software Foundation; either
 # version 2.1 of the License, or (at your option) version 3, or any
 # later version accepted by the membership of KDE e.V. (or its
 # successor approved by the membership of KDE e.V.), which shall
 # act as a proxy defined in Section 6 of version 3 of the license.
 #
 # This library 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
 # Lesser General Public License for more details.
 #
 # You should have received a copy of the GNU Lesser General Public
 # License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 require 'json'
 require 'optparse'
 
 module Tagger
   module_function
 
   Needle = Struct.new(:file, :json, :dirty)
 
   def parse_tags
     tags = []
 
     parser = OptionParser.new do |opts|
       opts.banner = "Usage: #{opts.program_name} [options] -t tag FILES"
 
-      opts.on('-t', '--tag HOST',
+      opts.on('-t', '--tag TAG',
               'tag to change [can be used multiple times ]') do |v|
         tags << v
       end
     end
     parser.parse!
 
     return tags unless tags.empty?
     abort "No tags passed!\n\n" + parser.help
   end
 
   def run
     tags = parse_tags
 
     ARGV.each { |x| abort "Not a file: #{x}" unless File.file?(x) }
     needles = ARGV.collect do |x|
       Needle.new(x, JSON.parse(File.read(x)))
     end
 
     needles.each do |needle|
       json_tags = needle.json.fetch('tags')
       orig_tags = json_tags.dup
       yield tags, json_tags
       next if json_tags == orig_tags
       needle.dirty = true
       needle.json['tags'] = json_tags
     end
 
     needles.each do |needle|
       next unless needle.dirty
       data = JSON.pretty_generate(needle.json)
       data += "\n" unless data.end_with?("\n")
       # Qt's JSON.stringify formats empty arrays as [], ruby injects a newline,
       # to avoid useless noise bend ruby accordingly.
       # Somewhat naughty but there doesn't seem to be a switch for this.
       data = data.gsub("\"properties\": [\n\n  ]", '"properties": []')
       File.write(needle.file, data)
     end
   end
 end