diff --git a/extensions/2.0/Vendor/GRIFFEL_bim_data/schema/GRIFFEL_bim_data.schema.json b/extensions/2.0/Vendor/GRIFFEL_bim_data/schema/GRIFFEL_bim_data.schema.json
index eac61a29df..5ca8c79106 100644
--- a/extensions/2.0/Vendor/GRIFFEL_bim_data/schema/GRIFFEL_bim_data.schema.json
+++ b/extensions/2.0/Vendor/GRIFFEL_bim_data/schema/GRIFFEL_bim_data.schema.json
@@ -17,7 +17,7 @@
                     "properties": {
                         "type": "array",
                         "uniqueItems": true,
-                        "item": {
+                        "items": {
                             "allOf": [ { "$ref": "glTFid.schema.json" } ],
                             "description": "Index of a property in the root level collection."
                         },