diff --git a/src/js/reverselookup.js b/src/js/reverselookup.js
index 8a4dac8c0..be06a503b 100644
--- a/src/js/reverselookup.js
+++ b/src/js/reverselookup.js
@@ -135,6 +135,7 @@ const fromNetFilter = async function(rawFilter) {
 
     const writer = new CompiledListWriter();
     const parser = new sfp.AstFilterParser({
+        expertMode: true,
         nativeCssHas: vAPI.webextFlavor.env.includes('native_css_has'),
         maxTokenLength: staticNetFilteringEngine.MAX_TOKEN_LENGTH,
     });