diff --git a/utils/region_of_interest.py b/utils/region_of_interest.py
index 3bbe4cd..e595db5 100644
--- a/utils/region_of_interest.py
+++ b/utils/region_of_interest.py
@@ -101,6 +101,7 @@ def process_atl06_algorithm(parms, asset, max_workers):
         "poly": region,
         "srt": icesat2.SRT_LAND,
         "cnf": icesat2.CNF_SURFACE_HIGH,
+        "atl08_class": ["atl08_ground"],
         "ats": 10.0,
         "cnt": 10,
         "len": 40.0,