diff --git a/src/js/static-filtering-parser.js b/src/js/static-filtering-parser.js
index 465d9f4e7..ac735dcc4 100644
--- a/src/js/static-filtering-parser.js
+++ b/src/js/static-filtering-parser.js
@@ -896,7 +896,7 @@ export class AstFilterParser {
         this.reResponseheaderPattern = /^\^responseheader\(.*\)$/;
         this.rePatternScriptletJsonArgs = /^\{.*\}$/;
         this.reGoodRegexToken = /[^\x01%0-9A-Za-z][%0-9A-Za-z]{7,}|[^\x01%0-9A-Za-z][%0-9A-Za-z]{1,6}[^\x01%0-9A-Za-z]/;
-        this.reBadCSP = /(?:=|;)\s*report-(?:to|uri)\b/;
+        this.reBadCSP = /(?:^|;)\s*report-(?:to|uri)\b/i;
         this.reNoopOption = /^_+$/;
         this.scriptletArgListParser = new ArgListParser(',');
     }