diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index a68e347dc..8faf9dd28 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -904,7 +904,7 @@ FilterGenericHnAnchored.prototype.match = function(url) {
 FilterGenericHnAnchored.fid = FilterGenericHnAnchored.prototype.fid = '||_';
 
 FilterGenericHnAnchored.prototype.toString = function() {
-    return this.s;
+    return '||' + this.s;
 };
 
 FilterGenericHnAnchored.prototype.toSelfie = function() {