diff --git a/slides/common/prereqs.md b/slides/common/prereqs.md
index 3c12a826..9eec2b3c 100644
--- a/slides/common/prereqs.md
+++ b/slides/common/prereqs.md
@@ -189,7 +189,7 @@ done
 
 ```bash
 if which kubectl; then
-  kubectl get all -o name | grep -v service/kubernetes | xargs -n1 kubectl delete
+  kubectl get all -o name | grep -v service/kubernetes | xargs -rn1 kubectl delete
 fi
 ```
 -->