diff --git a/doc/source/command-objects/project.rst b/doc/source/command-objects/project.rst
index b8607f0b62..3a1df598ee 100644
--- a/doc/source/command-objects/project.rst
+++ b/doc/source/command-objects/project.rst
@@ -14,6 +14,7 @@ Create new project
 
     os project create
         [--domain <domain>]
+        [--parent <project>]
         [--description <description>]
         [--enable | --disable]
         [--property <key=value>]