diff --git a/apps/participation/views.py b/apps/participation/views.py
index afeee63..e0a0003 100644
--- a/apps/participation/views.py
+++ b/apps/participation/views.py
@@ -540,7 +540,8 @@ class TournamentDetailView(DetailView):
         for participation in self.object.participations.all():
             note = sum(pool.average(participation)
                        for pool in self.object.pools.filter(participations=participation).all()
-                       if pool.results_available or self.request.user.registration.is_volunteer)
+                       if pool.results_available
+                       or (self.request.user.is_authenticated and self.request.user.registration.is_volunteer))
             if note:
                 notes[participation] = note
         context["notes"] = sorted(notes.items(), key=lambda x: x[1], reverse=True)