diff --git a/docs/sources/datasources/prometheus.md b/docs/sources/datasources/prometheus.md
index f723ecdf302..8fc7f4b40fc 100644
--- a/docs/sources/datasources/prometheus.md
+++ b/docs/sources/datasources/prometheus.md
@@ -166,6 +166,7 @@ apiVersion: 1
 datasources:
   - name: Prometheus
     type: prometheus
+    # Access mode - proxy (server in the UI) or direct (browser in the UI).
     access: proxy
     url: http://localhost:9090
 ```