diff --git a/misc/build.func b/misc/build.func
index 9b2d42baa..64309671f 100644
--- a/misc/build.func
+++ b/misc/build.func
@@ -715,7 +715,7 @@ advanced_settings() {
   fi
   echo -e "${DISABLEIPV6}${BOLD}${DGN}Disable IPv6: ${BGN}$DISABLEIP6${CL}"
 
-  if MTU1=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set Interface MTU Size (leave blank for default [1500])" 8 58 --title "MTU SIZE" 3>&1 1>&2 2>&3); then
+  if MTU1=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set Interface MTU Size (leave blank for default [The MTU of your selected vmbr, default is 1500])" 8 58 --title "MTU SIZE" 3>&1 1>&2 2>&3); then
     if [ -z $MTU1 ]; then
       MTU1="Default"
       MTU=""