diff --git a/vmm/src/api/openapi/cloud-hypervisor.yaml b/vmm/src/api/openapi/cloud-hypervisor.yaml
index 5de235755..06a9bb3f5 100644
--- a/vmm/src/api/openapi/cloud-hypervisor.yaml
+++ b/vmm/src/api/openapi/cloud-hypervisor.yaml
@@ -654,8 +654,12 @@ components:
 
     FsConfig:
       required:
-      - tag
+      - cache_size
+      - dax
+      - num_queues
+      - queue_size
       - socket
+      - tag
       type: object
       properties:
         tag: