diff --git a/docs/en/ml/getting-started.asciidoc b/docs/en/ml/getting-started.asciidoc
index dc99c3ff79b..86d0f0d8b12 100644
--- a/docs/en/ml/getting-started.asciidoc
+++ b/docs/en/ml/getting-started.asciidoc
@@ -163,7 +163,7 @@ gzip -d transactions.ndjson.gz
 ////
 Each document in the server-metrics data set has the following schema:
 
-[source,json]
+[source,js]
 ----------------------------------
 
 {