--- a/client/uiclient.c	Wed Dec 10 19:04:46 2025 +0100
+++ b/client/uiclient.c	Wed Dec 10 21:22:57 2025 +0100
@@ -83,7 +83,7 @@
 /*
  * This message callback is executed in the message handler input thread
  */
-void client_msg_received(cxmutstr msg) {
+void client_msg_received(cxstring msg) {
     // parse message
     CxJson json;
     cxJsonInit(&json, NULL);
@@ -182,7 +182,7 @@
     if(!obj_id.ptr) {
         return 1;
     }
-    if(!id) {
+    if(!id.ptr) {
         return 1;
     }