diff --git a/docs/user/services/understanding-servicetemplates.md b/docs/user/services/understanding-servicetemplates.md
index 251e77c02..147b01d9c 100644
--- a/docs/user/services/understanding-servicetemplates.md
+++ b/docs/user/services/understanding-servicetemplates.md
@@ -53,6 +53,7 @@ Helm-based `ServiceTemplate` can be created in three ways:
       chartRef:
         kind: HelmChart
         name: foo-chart
+        namespace: bar
   ```
 
 - by defining Helm chart source, which can be one of types provided by FluxCD: