diff --git a/server/extension/sql/110_data_observatory_augmentation.sql b/server/extension/sql/110_data_observatory_augmentation.sql
index e578b28..fb9dc70 100644
--- a/server/extension/sql/110_data_observatory_augmentation.sql
+++ b/server/extension/sql/110_data_observatory_augmentation.sql
@@ -619,7 +619,7 @@ RETURNS TABLE (
           quota_service.increment_success_service_use(len(result))
           return result
         else:
-          return None
+          return []
     except BaseException as e:
         import sys
         quota_service.increment_failed_service_use(len(geomvals))