diff --git a/DocService/sources/DocsCoServer.js b/DocService/sources/DocsCoServer.js
index 56b91633..9c870fc0 100644
--- a/DocService/sources/DocsCoServer.js
+++ b/DocService/sources/DocsCoServer.js
@@ -2542,7 +2542,7 @@ exports.install = function(server, callbackFunction) {
       const curUserId = curUserIdOriginal + curIndexUser;
       conn.tenant = tenantManager.getTenantByConnection(ctx, conn);
       conn.docId = data.docid;
-      conn.permissions = data.permissions;
+      conn.permissions = data.permissions || {};
       conn.user = {
         id: curUserId,
         idOriginal: curUserIdOriginal,
@@ -2988,7 +2988,7 @@ exports.install = function(server, callbackFunction) {
   }
 
   function* onMessage(ctx, conn, data) {
-    if (false === conn.permissions.chat) {
+    if (false === conn.permissions?.chat) {
       ctx.logger.warn("insert message permissions.chat==false");
       return;
     }