diff --git a/docs/config.md b/docs/config.md
index a3b0790fbc3c..a31ff17b792e 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -2116,6 +2116,8 @@ Type: `priority`
 
 ### `Swarm.Transports.Multiplexers.Mplex`
 
+**DEPRECATED**: See https://github.com/ipfs/kubo/issues/9958
+
 Support for Mplex has been removed. Please remove this option from your config.
 
 ## `DNS`