diff --git a/charts/spire/charts/spiffe-csi-driver/templates/policy.yaml b/charts/spire/charts/spiffe-csi-driver/templates/policy.yaml
index 6c82b45..0b20d8f 100644
--- a/charts/spire/charts/spiffe-csi-driver/templates/policy.yaml
+++ b/charts/spire/charts/spiffe-csi-driver/templates/policy.yaml
@@ -17,6 +17,7 @@ spec:
       resources:   ["pods"]
   validations:
   - expression: |
+      !has(object.spec.volumes) ||
       !object.spec.volumes.exists(c, has(c.csi) && has(c.csi.driver) && c.csi.driver == {{ .Values.pluginName | quote }})
     message: 'you may not use the upstream.csi.spiffe.io csi driver'
 ---