diff --git a/datagateway_api/search_api_mapping.json.example b/datagateway_api/search_api_mapping.json.example
index 19a81cfa..36c1f2e3 100644
--- a/datagateway_api/search_api_mapping.json.example
+++ b/datagateway_api/search_api_mapping.json.example
@@ -84,7 +84,7 @@
     "Sample": {
         "base_icat_entity": "Sample",
         "name": "name",
-        "pid": "pid",
+        "pid": ["pid", "id"],
         "description": "parameters.type.description",
         "datasets": {"Dataset": "datasets"}
     },