diff --git a/doc/plugins.rst b/doc/plugins.rst
index 35d2c4b78..0ed26c038 100644
--- a/doc/plugins.rst
+++ b/doc/plugins.rst
@@ -479,7 +479,9 @@ Decodes Musepack files using `libmpcdec <http://www.musepack.net/>`_.
 mpg123
 ------
 
-Decodes MP3 files using `libmpg123 <http://www.mpg123.de/>`_.
+Decodes MP3 files using `libmpg123 <http://www.mpg123.de/>`_. Currently, this
+decoder does not support streams (e.g. archived files, remote files over HTTP,
+...), only regular local files.
 
 opus
 ----