diff --git a/file/lib/data/chat/message/ChatMessageEditor.class.php b/file/lib/data/chat/message/ChatMessageEditor.class.php
index 00a5caf..0b02865 100644
--- a/file/lib/data/chat/message/ChatMessageEditor.class.php
+++ b/file/lib/data/chat/message/ChatMessageEditor.class.php
@@ -22,7 +22,7 @@ class ChatMessageEditor extends \wcf\data\DatabaseObjectEditor {
 	public static function create(array $parameters = array()) {
 		try {
 			if (CHAT_SOCKET_IO_PATH) {
-				if (file_exists(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock')) {
+				if (file_exists(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock') && is_writable(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock')) {
 					$sock = stream_socket_client('unix://'.WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock', $errno, $errstr, 1);
 					fclose($sock);
 				}
diff --git a/file/lib/util/ChatUtil.class.php b/file/lib/util/ChatUtil.class.php
index 7d590e6..e701467 100644
--- a/file/lib/util/ChatUtil.class.php
+++ b/file/lib/util/ChatUtil.class.php
@@ -45,7 +45,7 @@ final class ChatUtil {
 	 */
 	public static function getDiedUsers() {
 		$packageID = \wcf\util\ChatUtil::getPackageID();
-		if (CHAT_SOCKET_IO_PATH && file_exists(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock')) {
+		if (CHAT_SOCKET_IO_PATH && file_exists(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock') && is_writable(WCF_DIR.'acp/be.bastelstu.wcf.chat.serverPush/data.sock')) {
 			$sql = "SELECT
 					time
 				FROM