diff --git a/system/ThirdParty/Escaper/Escaper.php b/system/ThirdParty/Escaper/Escaper.php
index 39d9b0b1cdac..25119a0e5158 100644
--- a/system/ThirdParty/Escaper/Escaper.php
+++ b/system/ThirdParty/Escaper/Escaper.php
@@ -247,7 +247,7 @@ public function escapeCss(string $string)
     protected function htmlAttrMatcher($matches)
     {
         $chr = $matches[0];
-        $ord = ord($chr);
+        $ord = ord($chr[0]);
 
         /**
          * The following replaces characters undefined in HTML with the