diff --git a/bin/rocco b/bin/rocco
index e070f83..a78d073 100755
--- a/bin/rocco
+++ b/bin/rocco
@@ -35,8 +35,8 @@ options = {}
 ARGV.options { |o|
   o.program_name = File.basename($0)
   o.on("-o", "--output=DIR") { |dir| output_dir = dir }
-	o.on("-l", "--language=LANG") { |lang| options[:language] = lang }
-	o.on("-c", "--comment-chars=CHARS") { |chars| options[:comment_chars] = Regexp.escape(chars) }
+  o.on("-l", "--language=LANG") { |lang| options[:language] = lang }
+  o.on("-c", "--comment-chars=CHARS") { |chars| options[:comment_chars] = Regexp.escape(chars) }
   o.on_tail("-h", "--help") { usage($stdout, 0) }
   o.parse!
 } or abort_with_note