diff --git a/gns3server/schemas/qemu.py b/gns3server/schemas/qemu.py
index 03dc8cd8..43af3409 100644
--- a/gns3server/schemas/qemu.py
+++ b/gns3server/schemas/qemu.py
@@ -123,7 +123,7 @@ QEMU_CREATE_SCHEMA = {
         },
         "boot_priority": {
             "description": "QEMU boot priority",
-            "enum": ["c", "d"]
+            "enum": ["c", "d", "n", "cn", "cd"]
         },
         "ram": {
             "description": "amount of RAM in MB",