diff --git a/src/Model/ConversationModel.php b/src/Model/ConversationModel.php
index ac36a7467..c05386dab 100644
--- a/src/Model/ConversationModel.php
+++ b/src/Model/ConversationModel.php
@@ -291,7 +291,7 @@ public function markConversationAsRead(Member $member, array $thread): void
     public function formatConversation(Message $message): Message
     {
         $messageText = $message->getMessage();
-        $found = preg_match("/@|at|.at.|-at-|\(at\)/i", $messageText);
+        $found = preg_match("/@|.at.|-at-|\(at\)/i", $messageText);
 
         if ($found != 0) {
             $message->setSpamInfo(SpamInfoType::SPAM_BLOCKED_WORD);