diff --git a/docs/sandbox-permissions.rst b/docs/sandbox-permissions.rst
index 92646878..9502b0fe 100644
--- a/docs/sandbox-permissions.rst
+++ b/docs/sandbox-permissions.rst
@@ -510,6 +510,10 @@ prefixing with ``!``. The following conditions are supported:
 - ``false``- Always evaluates to false
 - ``has-input-device`` - True if the Flatpak version supports
   ``--device=input``
+- ``has-usb-device`` - True if the Flatpak version supports
+  ``--device=usb``
+- ``has-usb-portal`` - True if the current desktop session supports
+  the USB Portal
 - ``has-wayland`` - True if the current desktop session supports
   Wayland