diff --git a/src/js/biditrie.js b/src/js/biditrie.js
index 9ac7a1d70..ad06cc111 100644
--- a/src/js/biditrie.js
+++ b/src/js/biditrie.js
@@ -19,6 +19,8 @@
     Home: https://github.com/gorhill/uBlock
 */
 
+/* globals WebAssembly, vAPI */
+
 'use strict';
 
 /*******************************************************************************