diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6150b4b88e0..9e7cba42788 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fixed a bug where the control panel could display a notice about the Craft CMS license belonging to a different domain, even when accessing the control panel from the correct domain. ([#16396](https://github.com/craftcms/cms/issues/16396))
+- Fixed a bug where Unicode special characters weren’t getting stripped out of search keywords. ([#16430](https://github.com/craftcms/cms/issues/16430))
 
 ## 4.13.9 - 2025-01-06
 
diff --git a/src/helpers/Search.php b/src/helpers/Search.php
index 8be33b65c5b..941046a5d00 100644
--- a/src/helpers/Search.php
+++ b/src/helpers/Search.php
@@ -39,6 +39,10 @@ public static function normalizeKeywords(array|string $str, array $ignore = [],
         // Convert non-breaking spaces entities to regular ones
         $str = str_replace([' ', ' ', ' '], ' ', $str);
 
+        // Get rid of Unicode special characters
+        // (see https://github.com/craftcms/cms/issues/16430)
+        $str = preg_replace('/[\x{80}-\x{10FFFF}]/u', '', $str);
+
         // Get rid of entities
         $str = preg_replace('/&#?[a-z0-9]{2,8};/i', '', $str);