diff --git a/docs/user-guide/petset.md b/docs/user-guide/petset.md
index 0449c53812..6c205159bc 100644
--- a/docs/user-guide/petset.md
+++ b/docs/user-guide/petset.md
@@ -10,7 +10,7 @@ assignees:
 
 ---
 
-Starting in Kubernetes version 1.5, PetSet has been renamed to
+__Warning:__ Starting in Kubernetes version 1.5, PetSet has been renamed to
 [StatefulSet](/docs/concepts/abstractions/controllers/statefulsets/).
 To use (or continue to use) PetSet in Kubernetes 1.5 or higher, you must
 [migrate your existing PetSets to StatefulSets](/docs/tasks/manage-stateful-set/upgrade-pet-set-to-stateful-set/).