diff --git a/l2json/minio_obsid2time.py b/l2json/minio_obsid2time.py
index f7fe61a93fb12c9d55f1f1b92183ba5325957521..5a87cc68976351ab1003e5d6073c157e03aaa403 100644
--- a/l2json/minio_obsid2time.py
+++ b/l2json/minio_obsid2time.py
@@ -23,7 +23,7 @@ def main() -> None:
         metadata: list[CapturedMetadataDict] = fetch_minio_entries(  # type: ignore
             client=client,
             bucket=client_details["bucket"],
-            prefix=f"{station}/metadata/",
+            prefix=f"{station.lower()}/metadata/",
             tstart=args.tstart,
             tend=args.tend,
             dt=datetime.timedelta(seconds=15 * 60),
diff --git a/l2json/minio_time2obsid.py b/l2json/minio_time2obsid.py
index 3e592415673434a823a35c34f9c59fcbbdbdb41a..2aec5f8786d331a93e206707914f1a3c6dc3faeb 100644
--- a/l2json/minio_time2obsid.py
+++ b/l2json/minio_time2obsid.py
@@ -21,7 +21,7 @@ def main() -> None:
         metadata: list[CapturedMetadataDict] = fetch_minio_entries(  # type: ignore
             client=client,
             bucket=client_details["bucket"],
-            prefix=f"{station}/metadata/",
+            prefix=f"{station.lower()}/metadata/",
             tstart=args.tstart,
             tend=args.tend,
             dt=datetime.timedelta(seconds=15 * 60),