diff --git a/jupyterhub/schema.yaml b/jupyterhub/schema.yaml
index 0ffa237fef..a50eb5b157 100644
--- a/jupyterhub/schema.yaml
+++ b/jupyterhub/schema.yaml
@@ -674,9 +674,12 @@ properties:
                   documentation](https://kubernetes.io/docs/concepts/storage/persistent-volumes#access-modes-1)
                   for more information.
               storageClassName:
-                type: string
+                type: [string, "null"]
                 description: |
                   Name of the StorageClass required by the claim.
+
+                  If this is a blank string it will be set to a blank string,
+                  while if it is null, it will not be set at all.
               subPath:
                 type: string
                 description: |
diff --git a/jupyterhub/values.yaml b/jupyterhub/values.yaml
index c74f09e511..42f8a41dc3 100644
--- a/jupyterhub/values.yaml
+++ b/jupyterhub/values.yaml
@@ -64,7 +64,7 @@ hub:
         - ReadWriteOnce
       storage: 1Gi
       subPath: ""
-      storageClassName: ""
+      storageClassName:
     url: ""
     password: ""
   labels: {}