diff --git a/include/osmocom/vty/command.h b/include/osmocom/vty/command.h
index 2cb45dd..92701fc 100644
--- a/include/osmocom/vty/command.h
+++ b/include/osmocom/vty/command.h
@@ -24,6 +24,7 @@
 #pragma once
 
 #include <stdio.h>
+#include <stdbool.h>
 #include <sys/types.h>
 #include "vector.h"
 
@@ -65,6 +66,9 @@
 
 	/*! VTY application information */
 	const struct vty_app_info *app_info;
+
+	/*! Whether the expert mode is enabled. */
+	bool expert_mode;
 };
 
 /*! There are some command levels which called from command node. */
diff --git a/include/osmocom/vty/vty.h b/include/osmocom/vty/vty.h
index 4e83b1b..6a82d7e 100644
--- a/include/osmocom/vty/vty.h
+++ b/include/osmocom/vty/vty.h
@@ -32,7 +32,7 @@
 #define VTY_CMD_USR_ATTR_NUM 32
 /* Flag characters reserved for global VTY attributes */
 #define VTY_CMD_ATTR_FLAGS_RESERVED \
-	{ '.', '!', '@' }
+	{ '.', '!', '@', '^' }
 
 /*! VTY events */
 enum event {