diff --git a/lib/groonga/query-log/commandline-utils.rb b/lib/groonga/query-log/commandline-utils.rb
index a4609174..dc823b21 100755
--- a/lib/groonga/query-log/commandline-utils.rb
+++ b/lib/groonga/query-log/commandline-utils.rb
@@ -1,4 +1,3 @@
-#!/usr/bin/env ruby
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2012  Haruka Yoshihara <yoshihara@clear-code.com>