diff --git a/doc/api/diagnostics_channel.md b/doc/api/diagnostics_channel.md
index a776a45001940f..b3a941677f5369 100644
--- a/doc/api/diagnostics_channel.md
+++ b/doc/api/diagnostics_channel.md
@@ -403,6 +403,12 @@ 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`