diff --git a/main.c b/main.c
index 28aac45..a5e3426 100644
--- a/main.c
+++ b/main.c
@@ -2715,6 +2715,10 @@ static bool shell_check_connect(void){
 
 // Init shell I/O connection over USB
 static void shell_init_connection(void){
+/*
+ * Init shell thread object (need for switch threads)
+ */
+  osalThreadQueueObjectInit(&shell_thread);
 /*
  * Initializes and start serial-over-USB CDC driver SDU1, connected to USBD1
  */