diff --git a/docs/concepts/storage/volumes.md b/docs/concepts/storage/volumes.md
index f266a05027..8f3332c99f 100644
--- a/docs/concepts/storage/volumes.md
+++ b/docs/concepts/storage/volumes.md
@@ -211,6 +211,9 @@ its `log_level` entry are mounted into the Pod at path "`/etc/config/log_level`"
 Note that this path is derived from the volume's `mountPath` and the `path`
 keyed with `log_level`.
 
+**Important:** You must create a [ConfigMap](/docs/tasks/configure-pod-container/configure-pod-configmap/) before you can use it.
+{: .caution}
+
 **Note:** A container using a ConfigMap as a [subPath](#using-subpath) volume mount will not
 receive ConfigMap updates.
 {: .note}