diff --git a/sen2chain/tiles.py b/sen2chain/tiles.py
index 998d88899a284d7e9acdbf488b38818485a062b9..eee87c2662e3a801264ace2ff2fd8ae0650d909c 100644
--- a/sen2chain/tiles.py
+++ b/sen2chain/tiles.py
@@ -180,7 +180,7 @@ class ProductsList:
         """
         filtered = ProductsList()
         for k, v in self._dict.items():
-            if v["cloud_cover"]:
+            if v["cloud_cover"] >= 0:
                 if cover_min <= v["cloud_cover"] <= cover_max:
                     filtered[k] = {
                         "date": v["date"],