diff --git a/l2json/sources/minio.py b/l2json/sources/minio.py
index eb952159460a002b4f1ec7f0c5c09092578058b4..424b56daf2553aeb14095c875706ee30d8f7919d 100644
--- a/l2json/sources/minio.py
+++ b/l2json/sources/minio.py
@@ -90,9 +90,10 @@ def fetch_minio_entries(
                     reference=objname if store_filename else "",
                 )
                 parsed_files += 1
-                objects.set_description(
-                    f"{tqdm_desc} ({parsed_files} file(s) kept, {(1 - (tend + dt - t).total_seconds() / (tend - tstart + 2 * dt).total_seconds()) * 100:.1f}% through the observing window)"
-                )
+                if tqdm_desc:
+                    objects.set_description(
+                        f"{tqdm_desc} ({parsed_files} file(s) kept, {(1 - (tend + dt - t).total_seconds() / (tend - tstart + 2 * dt).total_seconds()) * 100:.1f}% through the observing window)"
+                    )
         working_day += timedelta(days=1)
     return data