diff --git a/INSTALL/grub/grub.cfg b/INSTALL/grub/grub.cfg
index 13b9410a..9fbc0679 100644
--- a/INSTALL/grub/grub.cfg
+++ b/INSTALL/grub/grub.cfg
@@ -2575,6 +2575,7 @@ export VTOY_HELP_CMD
 export VTOY_CHKSUM_CMD
 export VTOY_HELP_TXT_LANGUAGE
 export VTOY_CHKSUM_FILE_PATH
+export VTOY_HOTKEY_TIP
 
 
 #colect all image files (iso files)