diff --git a/system/ee/ExpressionEngine/Service/Validation/Rule/AlphaDashPeriodEmoji.php b/system/ee/ExpressionEngine/Service/Validation/Rule/AlphaDashPeriodEmoji.php
index 4e08509296..3b5f187aeb 100644
--- a/system/ee/ExpressionEngine/Service/Validation/Rule/AlphaDashPeriodEmoji.php
+++ b/system/ee/ExpressionEngine/Service/Validation/Rule/AlphaDashPeriodEmoji.php
@@ -32,7 +32,7 @@ public function validate($key, $value)
 
     protected function stripEmojis($value)
     {
-        $regex = '/(?:' . ee('Emoji')->emojiRegex . ')/u';
+        $regex = '/(?:[' . ee('Emoji')->emojiRegex . '])/iu';
         $value = preg_replace($regex, '', $value);
 
         return $value;