diff --git a/Doc/library/undoc.rst b/Doc/library/undoc.rst
index deff5e2..7da1b3b 100644
--- a/Doc/library/undoc.rst
+++ b/Doc/library/undoc.rst
@@ -54,6 +54,8 @@
 :mod:`linuxaudiodev`
    --- Play audio data on the Linux audio device.  Replaced in Python 2.3 by the
    :mod:`ossaudiodev` module.
+   
+   .. warning:: The linuxaudiodev module has been removed in Python 3.0.
 
 :mod:`sunaudio`
    --- Interpret Sun audio headers (may become obsolete or a tool/demo).