diff --git a/doc/api/diagnostics_channel.md b/doc/api/diagnostics_channel.md
index 019fe9a6614b9d..8f62cd3c632e81 100644
--- a/doc/api/diagnostics_channel.md
+++ b/doc/api/diagnostics_channel.md
@@ -409,6 +409,12 @@ channel.unsubscribe(onMessage);
 
 ### Built-in Channels
 
+> Stability: 1 - Experimental
+
+While the diagnostics\_channel API is now considered stable, the built-in
+channels currently available are not. Each channel must be declared stable
+independently.
+
 #### HTTP
 
 `http.client.request.start`