diff --git a/mosstool/trip/route/preroute.py b/mosstool/trip/route/preroute.py
index 2b6d554..017c833 100644
--- a/mosstool/trip/route/preroute.py
+++ b/mosstool/trip/route/preroute.py
@@ -41,6 +41,7 @@ async def pre_route(
     departure_time = None
     all_schedules = list(person.schedules)
     person.ClearField("schedules")
+    good_schedules = []
     for schedule in all_schedules:
         schedule = cast(Schedule, schedule)
         if schedule.HasField("departure_time"):
@@ -98,4 +99,6 @@ async def pre_route(
             good_schedule.CopyFrom(schedule)
             good_schedule.ClearField("trips")
             good_schedule.trips.extend(good_trips)
+            good_schedules.append(good_schedule)
+    person.schedules.extend(good_schedules)
     return person