diff --git a/content/en/docs/concepts/storage/persistent-volumes.md b/content/en/docs/concepts/storage/persistent-volumes.md
index 2d1064ed7c..848312b5b8 100644
--- a/content/en/docs/concepts/storage/persistent-volumes.md
+++ b/content/en/docs/concepts/storage/persistent-volumes.md
@@ -231,7 +231,7 @@ the following types of volumes:
 * Azure Disk
 * Portworx
 * FlexVolumes
-* CSI
+* {{< glossary_tooltip text="CSI" term_id="csi" >}}
 
 You can only expand a PVC if its storage class's `allowVolumeExpansion` field is set to true.