diff --git a/osm_nbi/validation.py b/osm_nbi/validation.py
index d1cfc1d..1d637c5 100644
--- a/osm_nbi/validation.py
+++ b/osm_nbi/validation.py
@@ -316,6 +316,19 @@
                     "additionalProperties": False,
                 },
             },
+            "affinity-or-anti-affinity-group": {
+                "type": "array",
+                "items": {
+                    "type": "object",
+                    "properties": {
+                        "id": name_schema,
+                        "vim-affinity-group-id": name_schema,
+                    },
+                    "required": ["id"],
+                    "minProperties": 2,
+                    "additionalProperties": False,
+                },
+            },
         },
         "required": ["member-vnf-index"],
         "minProperties": 2,