diff --git a/api/admin.py b/api/admin.py
index 8e97b8b5..935c3578 100644
--- a/api/admin.py
+++ b/api/admin.py
@@ -159,6 +159,10 @@ class UserProfileAdmin(AdminChangeLinksMixin, admin.ModelAdmin):
         "num_disputes",
         "lost_disputes",
     )
+    raw_id_fields = (
+        "user",
+        "referred_by",
+    )
     list_editable = ["pending_rewards", "earned_rewards"]
     list_display_links = ("avatar_tag", "id")
     change_links = ["user"]
diff --git a/control/tasks.py b/control/tasks.py
index 60c6720c..019f61b6 100644
--- a/control/tasks.py
+++ b/control/tasks.py
@@ -56,6 +56,7 @@ def do_accounting():
         outflow = offchain_outflow + onchain_outflow
         routing_fees  = 0 if routing_fees == None else routing_fees
         rewards_claimed = 0 if rewards_claimed == None else rewards_claimed
+        mining_fees = 0 if mining_fees == None else mining_fees
 
         accounted_day = AccountingDay.objects.create(
             day = day,