diff --git a/vmm/src/api/openapi/cloud-hypervisor.yaml b/vmm/src/api/openapi/cloud-hypervisor.yaml
index eb7a44de0..c793ce3ed 100644
--- a/vmm/src/api/openapi/cloud-hypervisor.yaml
+++ b/vmm/src/api/openapi/cloud-hypervisor.yaml
@@ -502,6 +502,8 @@ components:
     PayloadConfig:
       type: object
       properties:
+        firmware:
+          type: string
         kernel:
           type: string
         cmdline: