diff --git a/vmm/src/api/openapi/cloud-hypervisor.yaml b/vmm/src/api/openapi/cloud-hypervisor.yaml
index e9b3fae70..c16e05a5b 100644
--- a/vmm/src/api/openapi/cloud-hypervisor.yaml
+++ b/vmm/src/api/openapi/cloud-hypervisor.yaml
@@ -256,6 +256,8 @@ components:
           $ref: '#/components/schemas/MemoryConfig'
         kernel:
           $ref: '#/components/schemas/KernelConfig'
+        initramfs:
+          $ref: '#/components/schemas/InitramfsConfig'
         cmdline:
           $ref: '#/components/schemas/CmdLineConfig'
         disks:
@@ -337,6 +339,14 @@ components:
         path:
           type: string
 
+    InitramfsConfig:
+      required:
+      - path
+      type: object
+      properties:
+        path:
+          type: string
+
     CmdLineConfig:
       required:
       - args