diff --git a/file/lib/page/ChatPage.class.php b/file/lib/page/ChatPage.class.php
index bb56a09..d42fb9a 100644
--- a/file/lib/page/ChatPage.class.php
+++ b/file/lib/page/ChatPage.class.php
@@ -134,7 +134,7 @@ public function readData() {
 		}
 		
 		if (MODULE_ATTACHMENT) {
-			$this->attachmentHandler = new \wcf\system\attachment\AttachmentHandler('be.bastelstu.chat.message', 0, '', 0);
+			$this->attachmentHandler = new \wcf\system\attachment\AttachmentHandler('be.bastelstu.chat.message', 0, \wcf\util\StringUtil::getRandomID(), 0);
 		}
 	}