diff --git a/vmm/src/api/openapi/cloud-hypervisor.yaml b/vmm/src/api/openapi/cloud-hypervisor.yaml
index 984a90029..f41b2b94f 100644
--- a/vmm/src/api/openapi/cloud-hypervisor.yaml
+++ b/vmm/src/api/openapi/cloud-hypervisor.yaml
@@ -187,6 +187,22 @@ paths:
         500:
           description: The new disk could not be added to the VM instance.
 
+  /vm.add-pmem:
+    put:
+      summary: Add a new pmem device to the VM
+      requestBody:
+        description: The details of the new pmem device
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/PmemConfig'
+        required: true
+      responses:
+        204:
+          description: The new device was successfully added to the VM instance.
+        500:
+          description: The new device could not be added to the VM instance.
+
 components:
   schemas: