diff --git a/envoy/config/listener/v3/listener_components.proto b/envoy/config/listener/v3/listener_components.proto
index 303b5fb5..150a6851 100644
--- a/envoy/config/listener/v3/listener_components.proto
+++ b/envoy/config/listener/v3/listener_components.proto
@@ -155,6 +155,7 @@ message FilterChainMatch {
   // will be first matched against ``www.example.com``, then ``*.example.com``, then ``*.com``.
   //
   // Note that partial wildcards are not supported, and values like ``*w.example.com`` are invalid.
+  // The value ``*`` is also not supported, and ``server_names`` should be omitted instead.
   //
   // .. attention::
   //