diff --git a/app/models/user.rb b/app/models/user.rb
index c7b883e6e..efe5b30a3 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -599,8 +599,8 @@ class User < Principal
     Message.update_all ['author_id = ?', substitute.id], ['author_id = ?', id]
     News.update_all ['author_id = ?', substitute.id], ['author_id = ?', id]
     # Remove private queries and keep public ones
-    Query.delete_all ['user_id = ? AND is_public = ?', id, false]
-    Query.update_all ['user_id = ?', substitute.id], ['user_id = ?', id]
+    ::Query.delete_all ['user_id = ? AND is_public = ?', id, false]
+    ::Query.update_all ['user_id = ?', substitute.id], ['user_id = ?', id]
     TimeEntry.update_all ['user_id = ?', substitute.id], ['user_id = ?', id]
     Token.delete_all ['user_id = ?', id]
     Watcher.delete_all ['user_id = ?', id]