diff --git a/participation/admin.py b/participation/admin.py
index 5d870ac..510f027 100644
--- a/participation/admin.py
+++ b/participation/admin.py
@@ -52,7 +52,7 @@ class PassageAdmin(admin.ModelAdmin):
                     'pool_abbr', 'tournament')
     list_filter = ('pool__tournament', 'pool__round', 'pool__letter', 'solution_number',)
     search_fields = ('pool__participations__team__name', 'pool__participations__team__trigram',)
-    autocomplete_fields = ('pool', 'defender', 'opponent', 'reporter',)
+    autocomplete_fields = ('pool', 'defender', 'opponent', 'reporter', 'observer',)
 
     @admin.display(description=_("defender"))
     def defender_trigram(self, record: Passage):