diff --git a/src/calibre/db/backend.py b/src/calibre/db/backend.py
index b0144bc91d..87a3346375 100644
--- a/src/calibre/db/backend.py
+++ b/src/calibre/db/backend.py
@@ -1409,7 +1409,7 @@ class DB:
         if self.fts_enabled and include_fts_db:
             self.fts.vacuum()
         if include_notes_db:
-            self.notes.vacuum()
+            self.notes.vacuum(self.conn)
 
     @property
     def user_version(self):