diff --git a/settings/storage.rst b/settings/storage.rst
index c531ce4..d28250b 100644
--- a/settings/storage.rst
+++ b/settings/storage.rst
@@ -39,3 +39,5 @@ Cassette
 --------
 
 Enable IBM cassette tape emulation. The cassette deck can be controlled through the :ref:`status bar <usage/statusbar:|cassette| Cassette deck>` or :ref:`Media menu <usage/menubar:Media>`.
+
+.. note:: While cassette emulation can be enabled on any machine, it is only usable on the IBM PC, PCjr and other machines with an IBM cassette port.