diff --git a/docs/sources/datasources/prometheus/configure-prometheus-data-source.md b/docs/sources/datasources/prometheus/configure-prometheus-data-source.md
index 69210106914..014487ae277 100644
--- a/docs/sources/datasources/prometheus/configure-prometheus-data-source.md
+++ b/docs/sources/datasources/prometheus/configure-prometheus-data-source.md
@@ -111,7 +111,7 @@ Following are additional configuration options.
 
 - **Allowed cookies** - Specify cookies by name that should be forwarded to the data source. The Grafana proxy deletes all forwarded cookies by default.
 
-- **Timeout** - The HTTP request timeout. This must be in seconds. There is no default, so this setting is up to you.
+- **Timeout** - The HTTP request timeout. This must be in seconds. The default is 30 seconds.
 
 ### Alerting