diff --git a/fix/rewrite_sta_ssp_ids.py b/fix/rewrite_sta_ssp_ids.py
new file mode 100644
index 0000000..c3d0a5e
--- /dev/null
+++ b/fix/rewrite_sta_ssp_ids.py
@@ -0,0 +1,106 @@
+"""
+Fix ScheduledStopPoint IDs to match SIRI feed format.
+
+Transforms IDs from:  IT:ITH1:ScheduledStopPoint:it-22021-7010-51-32073:
+to:                   IT:ITH10:ScheduledStopPoint:7010:51:32073
+
+This is needed so that NeTEx and SIRI feeds reference the same stops.
+
+It is a mystery to me why this cannot be fixed at the source.
+"""
+
+import dataclasses
+import logging
+import re
+from collections.abc import Generator
+from pathlib import Path
+from typing import Any
+
+from domain.netex.model import (
+    PassengerStopAssignment,
+    Route,
+    RoutePoint,
+    RoutePointRef,
+    ScheduledStopPoint,
+    ScheduledStopPointRef,
+    ServiceJourneyPattern,
+    ServiceLink,
+    TimingLink,
+)
+from domain.netex.services.recursive_attributes import recursive_attributes
+from storage.mdbx.core.implementation import MdbxStorage
+from utils.aux_logging import log_all, prepare_logger
+
+_PATTERN = re.compile(r'^.*:ScheduledStopPoint:it-22021-(.+):$')
+
+
+def _new_id(old_id: str) -> str | None:
+    m = _PATTERN.match(old_id)
+    if m:
+        return 'IT:ITH10:ScheduledStopPoint:' + m.group(1).replace('-', ':')
+    return None
+
+
+# Object types that may transitively contain ScheduledStopPointRef or RoutePointRef.
+_REF_BEARING_TYPES = [
+    ServiceJourneyPattern,
+    ServiceLink,
+    TimingLink,
+    PassengerStopAssignment,
+    Route,
+    RoutePoint,
+]
+
+
+def _iter_updated_objects(
+    db: MdbxStorage, txn: Any,
+) -> Generator[Any, None, None]:
+    for cls in _REF_BEARING_TYPES:
+        for obj in db.iter_only_objects(txn, cls):
+            changed = False
+            for ref, _path in recursive_attributes(obj, []):
+                if isinstance(ref, (ScheduledStopPointRef, RoutePointRef)):
+                    new_ref = _new_id(ref.ref)
+                    if new_ref is not None:
+                        ref.ref = new_ref
+                        changed = True
+            if changed:
+                yield obj
+
+
+def _iter_renamed_ssps(
+    db: MdbxStorage, txn: Any,
+) -> Generator[ScheduledStopPoint, None, None]:
+    for ssp in db.iter_only_objects(txn, ScheduledStopPoint):
+        new_id = _new_id(ssp.id)
+        if new_id is not None:
+            yield dataclasses.replace(ssp, id=new_id)
+
+
+def fix_ssp_ids(database: Path) -> None:
+    with MdbxStorage(database, readonly=False) as db:
+        with db.env.rw_transaction() as txn:
+            # TODO: delete the old ScheduledStopPoint objects (no delete API available yet)
+            db.insert_any_object_on_queue(txn, _iter_updated_objects(db, txn))
+            db.insert_any_object_on_queue(txn, _iter_renamed_ssps(db, txn))
+            txn.commit()
+
+
+def main(source_database_file: str) -> None:
+    fix_ssp_ids(Path(source_database_file))
+
+
+if __name__ == "__main__":
+    import argparse
+    import traceback
+
+    parser = argparse.ArgumentParser(description="Fix ScheduledStopPoint IDs to SIRI format")
+    parser.add_argument("source", type=str, help="mdbx file to fix in-place")
+    parser.add_argument("--log_file", type=str, required=False, help="log file path")
+    args = parser.parse_args()
+    prepare_logger(logging.INFO, args.log_file)
+    try:
+        main(args.source)
+    except Exception as e:
+        log_all(logging.ERROR, f"{e}")
+        raise e
diff --git a/test/rewrite_sta_ssp_ids.py b/test/rewrite_sta_ssp_ids.py
new file mode 100644
index 0000000..b482790
--- /dev/null
+++ b/test/rewrite_sta_ssp_ids.py
@@ -0,0 +1,10 @@
+import unittest
+
+from fix.rewrite_sta_ssp_ids import main
+
+class FixSSPTestCase(unittest.TestCase):
+    def test(self):
+        main("sta.lmdb")
+
+if __name__ == '__main__':
+    unittest.main()
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