diff --git a/tasmota/support_command.ino b/tasmota/support_command.ino
index 5854c0ed1..61a0962b4 100644
--- a/tasmota/support_command.ino
+++ b/tasmota/support_command.ino
@@ -1334,7 +1334,7 @@ void CmndSerialConfig(void)
 
 void CmndSerialSend(void)
 {
-  if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= 5)) {
+  if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= 6)) {
     SetSeriallog(LOG_LEVEL_NONE);
     Settings.flag.mqtt_serial = 1;                                  // CMND_SERIALSEND and CMND_SERIALLOG
     Settings.flag.mqtt_serial_raw = (XdrvMailbox.index > 3) ? 1 : 0;  // CMND_SERIALSEND3