diff --git a/docs/concepts/workloads/controllers/nginx-deployment.yaml b/docs/concepts/workloads/controllers/nginx-deployment.yaml
index 2aabf5e7b1..4ce71688f7 100644
--- a/docs/concepts/workloads/controllers/nginx-deployment.yaml
+++ b/docs/concepts/workloads/controllers/nginx-deployment.yaml
@@ -1,4 +1,4 @@
-apiVersion: apps/v1beta1
+apiVersion: apps/v1beta1 # for versions before 1.6.0 use extensions/v1beta1
 kind: Deployment
 metadata:
   name: nginx-deployment