diff --git a/schema_clusters.json b/schema_clusters.json
index d1cd920..9ffca60 100644
--- a/schema_clusters.json
+++ b/schema_clusters.json
@@ -139,6 +139,9 @@
                 "items": {
                   "type": "string"
                 }
+              },
+              "NACE_CODE": {
+                "type": "string"
               }
             }
           }