diff --git a/msc_pygeoapi/loader/forecast_polygons.py b/msc_pygeoapi/loader/forecast_polygons.py
index 64c3e35c..33d98657 100644
--- a/msc_pygeoapi/loader/forecast_polygons.py
+++ b/msc_pygeoapi/loader/forecast_polygons.py
@@ -51,7 +51,7 @@
 INDEX_NAME = 'forecast_polygons_{}_{}'
 
 FILE_PROPERTIES = {
-    'OBJECT_ID': {
+    'OBJECTID': {
         'type': 'integer',
     },
     'CLC': {