diff --git a/src/js/static-filtering-parser.js b/src/js/static-filtering-parser.js
index 9993acb6b..18b15fa42 100644
--- a/src/js/static-filtering-parser.js
+++ b/src/js/static-filtering-parser.js
@@ -2239,7 +2239,10 @@ export class AstFilterParser {
         const regex = before.startsWith('[$domain=/')
             ? `${before.slice(9, -1)}`
             : before;
-        const source = this.normalizeRegexPattern(regex);
+        // TODO: Remove unescaping of `|` once AdGuard filters no longer unduly
+        // escape. In the mean time, if a literal `|` is needed in a path-based
+        // regex, the solution is to use `\x7C` instead of `|`.
+        const source = this.normalizeRegexPattern(regex.replace(/\\\|/g, '|'));
         if ( source === '' ) { return ''; }
         const after = `/${source}/`;
         if ( after === before ) { return; }