diff --git a/src/js/hntrie.js b/src/js/hntrie.js
index 8208ad92e..5af943139 100644
--- a/src/js/hntrie.js
+++ b/src/js/hntrie.js
@@ -19,6 +19,8 @@
     Home: https://github.com/gorhill/uBlock
 */
 
+/* globals self */
+
 'use strict';
 
 /*******************************************************************************