diff --git a/marietje/songs/admin.py b/marietje/songs/admin.py
index 9ff8927..79f456a 100644
--- a/marietje/songs/admin.py
+++ b/marietje/songs/admin.py
@@ -32,3 +32,4 @@ class SongAdmin(admin.ModelAdmin):
 class ReportNoteAdmin(admin.ModelAdmin):
     list_display = ('song', 'note', 'user')
     search_fields = ('song__artist', 'song__title', 'user__name')
+    readonly_fields = ('song',)