diff --git a/doc/source/command-objects/subnet.rst b/doc/source/command-objects/subnet.rst
index f0d5e90aa7..ba80037394 100644
--- a/doc/source/command-objects/subnet.rst
+++ b/doc/source/command-objects/subnet.rst
@@ -151,6 +151,7 @@ List subnets
 
     os subnet list
         [--long]
+        [--ip-version {4,6}]
 
 .. option:: --long