diff --git a/src/c3nav/mapdata/tasks.py b/src/c3nav/mapdata/tasks.py
index 8e1aa185..c2d600f8 100644
--- a/src/c3nav/mapdata/tasks.py
+++ b/src/c3nav/mapdata/tasks.py
@@ -2,6 +2,7 @@ import logging
 import time
 
 from celery.exceptions import MaxRetriesExceededError
+from django.contrib.auth import get_user_model
 from django.core.cache import cache
 from django.utils.formats import date_format
 from django.utils.translation import gettext_lazy as _
@@ -57,7 +58,8 @@ def delete_map_cache_key(self, cache_key):
 
 
 @app.task(bind=True, max_retries=10)
-def update_ap_names_bssid_mapping(self, map_name, user):
+def update_ap_names_bssid_mapping(self, map_name, user_id):
+    user = get_user_model().objects.filter(pk=user_id)
     from c3nav.mapdata.models.geometry.space import RangingBeacon
     todo = []
     for beacon in RangingBeacon.objects.filter(ap_name__in=map_name.keys(),
diff --git a/src/c3nav/routing/api/positioning.py b/src/c3nav/routing/api/positioning.py
index 32cf598a..c3157ba7 100644
--- a/src/c3nav/routing/api/positioning.py
+++ b/src/c3nav/routing/api/positioning.py
@@ -61,7 +61,7 @@ def get_position(request, parameters: LocateRequestSchema):
         if bssid_mapping:
             update_ap_names_bssid_mapping.delay(
                 map_name={str(name): [str(b) for b in bssids] for name, bssids in bssid_mapping.items()},
-                user=request.user
+                user_id=request.user.pk
             )
 
     return {