diff --git a/ryu/cmd/manager.py b/ryu/cmd/manager.py
index b1180f7b..4710547b 100755
--- a/ryu/cmd/manager.py
+++ b/ryu/cmd/manager.py
@@ -52,12 +52,14 @@ CONF.register_cli_opts([
 ])
 
 
-def main():
+def main(args=None, prog=None):
     try:
-        CONF(project='ryu', version='ryu-manager %s' % version,
+        CONF(args=args, prog=prog,
+             project='ryu', version='ryu-manager %s' % version,
              default_config_files=['/usr/local/etc/ryu/ryu.conf'])
     except cfg.ConfigFilesNotFoundError:
-        CONF(project='ryu', version='ryu-manager %s' % version)
+        CONF(args=args, prog=prog,
+             project='ryu', version='ryu-manager %s' % version)
 
     log.init_log()
 
diff --git a/ryu/cmd/of_config_cli.py b/ryu/cmd/of_config_cli.py
index 0f4c2cf4..61de4e45 100755
--- a/ryu/cmd/of_config_cli.py
+++ b/ryu/cmd/of_config_cli.py
@@ -545,8 +545,9 @@ lost-connection-behavior failStandaloneMode
             self._in_onecmd = False
 
 
-def main():
-    CONF(project='of-config-cli', version='of-config-cli')
+def main(args=None, prog=None):
+    CONF(args=args, prog=prog,
+         project='of-config-cli', version='of-config-cli')
 
     for p_str in CONF.peers:
         name, addr = p_str.split('=')
diff --git a/ryu/cmd/rpc_cli.py b/ryu/cmd/rpc_cli.py
index a297000b..691f9a2d 100755
--- a/ryu/cmd/rpc_cli.py
+++ b/ryu/cmd/rpc_cli.py
@@ -222,8 +222,8 @@ class Cmd(cmd.Cmd):
         signal.alarm(self._notification_check_interval)
 
 
-def main():
-    CONF(project='rpc-cli', version='rpc-cli')
+def main(args=None, prog=None):
+    CONF(args=args, prog=prog, project='rpc-cli', version='rpc-cli')
 
     for p_str in CONF.peers:
         name, addr = p_str.split('=')