diff --git a/src/util/Injected/Utils.js b/src/util/Injected/Utils.js
index 39a0e42..224ac7e 100644
--- a/src/util/Injected/Utils.js
+++ b/src/util/Injected/Utils.js
@@ -247,7 +247,7 @@ exports.LoadUtils = () => {
         let from = chat.id.isLid() ? lidUser : meUser;
         let participant;
 
-        if (chat.isGroup) {
+        if (typeof chat.id?.isGroup === 'function' && chat.id.isGroup()) {
             from = chat.groupMetadata && chat.groupMetadata.isLidAddressingMode ? lidUser : meUser;
             participant = window.Store.WidFactory.toUserWid(from);
         }