diff --git a/Authors b/Authors
index a2d212497a..3b9e3652f3 100644
--- a/Authors
+++ b/Authors
@@ -38,5 +38,6 @@ Thierry Carrez <thierry@openstack.org>
 Tom Hancock <tom.hancock@hp.com>
 William Wolf <throughnothing@gmail.com>
 Vishvananda Ishaya <vishvananda@gmail.com>
+Yaguang Tang <heut2008@gmail.com>
 Yuriy Taraday <yorik.sar@gmail.com>
 Zhongyue Luo <lzyeval@gmail.com>
diff --git a/bin/glance-control b/bin/glance-control
index 39d588d915..7ba2a1bdce 100755
--- a/bin/glance-control
+++ b/bin/glance-control
@@ -26,7 +26,6 @@ from __future__ import with_statement
 import errno
 import gettext
 import os
-import optparse
 import resource
 import signal
 import sys
@@ -190,7 +189,7 @@ if __name__ == '__main__':
     args = conf()
 
     if len(args) < 2:
-        oparser.print_usage()
+        conf.print_usage()
         sys.exit(1)
 
     server = args.pop(0).lower()