diff --git a/ChangeLog b/ChangeLog
index 8d7ad4235..e5a2f93ff 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2020-12-19 Daniel Hawkins:
+        * python/quests/QuestAdvance.py: Bail from method if non-player activator has no owner.
+
 2020-12-17  Nicolas Weeger
         * /scorn/houses/resir: Move exit under an extra grass column on the right, for coherence.
         * scorn/temples/valkyrie: Fix stairs coordinates.
diff --git a/python/quests/QuestAdvance.py b/python/quests/QuestAdvance.py
index 4dcd8e996..3940f4602 100644
--- a/python/quests/QuestAdvance.py
+++ b/python/quests/QuestAdvance.py
@@ -52,6 +52,9 @@ def handle():
     return
   # if a spell was used, then the killer is the spell object, find the owner
   if player.Type != Crossfire.Type.PLAYER:
+    # If the non-player has no owner, then no quest changes.
+    if player.Owner is None:
+      return
     player = player.Owner
 
   if player.Type != Crossfire.Type.PLAYER: