diff --git a/content/en/docs/tasks/configure-pod-container/configure-pod-configmap.md b/content/en/docs/tasks/configure-pod-container/configure-pod-configmap.md
index 668db33f09..f0055771b9 100644
--- a/content/en/docs/tasks/configure-pod-container/configure-pod-configmap.md
+++ b/content/en/docs/tasks/configure-pod-container/configure-pod-configmap.md
@@ -703,7 +703,7 @@ spec:
             configMapKeyRef:
               name: a-config
               key: akey
-              optional: true
+              optional: true # mark the variable as optional
   restartPolicy: Never
 ```