diff --git a/Documentation/sound/index.rst b/Documentation/sound/index.rst
index c437f2a4bc85..51cd736f65b5 100644
--- a/Documentation/sound/index.rst
+++ b/Documentation/sound/index.rst
@@ -13,6 +13,7 @@ Sound Subsystem Documentation
    alsa-configuration
    hd-audio/index
    cards/index
+   codecs/index
    utimers
 
 .. only::  subproject and html