diff --git a/doc/source/man/openstack.rst b/doc/source/man/openstack.rst
index 7af380a31c..e03b48e5c8 100644
--- a/doc/source/man/openstack.rst
+++ b/doc/source/man/openstack.rst
@@ -12,7 +12,7 @@ SYNOPSIS
 
 :program:`openstack help` <command>
 
-:program:`openstack` --help
+:program:`openstack` :option:`--help`
 
 
 DESCRIPTION