diff --git a/gns3server/schemas/controller/appliances.py b/gns3server/schemas/controller/appliances.py
index 563f2f5fa..23e7b32c0 100644
--- a/gns3server/schemas/controller/appliances.py
+++ b/gns3server/schemas/controller/appliances.py
@@ -632,6 +632,9 @@ class ApplianceV1_6(BaseModel):
         None,
         title='Optional port segment size. A port segment is a block of port. For example Ethernet0/0 Ethernet0/1 is the module 0 with a port segment size of 2',
     )
+    custom_adapters: Optional[List[CustomAdapterItem]] = Field(
+        None, title='Optional per-adapter overrides (port name, adapter type, MAC address)'
+    )
     linked_clone: Optional[bool] = Field(None, title="False if you don't want to use a single image for all nodes")
     docker: Optional[Docker] = Field(None, title='Docker specific options')
     iou: Optional[Iou] = Field(None, title='IOU specific options')