diff --git a/docs/tutorials/istio.md b/docs/tutorials/istio.md
index 96a3b95e5..68263c7cc 100644
--- a/docs/tutorials/istio.md
+++ b/docs/tutorials/istio.md
@@ -157,6 +157,7 @@ apiVersion: networking.istio.io/v1alpha3
 kind: Gateway
 metadata:
   name: httpbin-gateway
+  namespace: istio-system
 spec:
   selector:
     istio: ingressgateway # use Istio default gateway implementation