diff --git a/osm_openvim/vim_schema.py b/osm_openvim/vim_schema.py
index 59225ac..f09aff8 100644
--- a/osm_openvim/vim_schema.py
+++ b/osm_openvim/vim_schema.py
@@ -778,7 +778,7 @@
         "ofc_id": id_schema,
         "region": nameshort_schema,
         "compute_node": nameshort_schema,
-        "pci": pci_extended_schema,
+        "pci": {"OneOf": [{"type": "null"}, pci_extended_schema]},
         "switch_dpid": nameshort_schema,
         "switch_port": nameshort_schema,
         "switch_mac": mac_schema