diff --git a/tasmota/support_command.ino b/tasmota/support_command.ino
index 14fb7a575..5a4c955d8 100644
--- a/tasmota/support_command.ino
+++ b/tasmota/support_command.ino
@@ -1336,7 +1336,8 @@ void CmndTeleperiod(void)
   if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload < 3601)) {
     Settings.tele_period = (1 == XdrvMailbox.payload) ? TELE_PERIOD : XdrvMailbox.payload;
     if ((Settings.tele_period > 0) && (Settings.tele_period < 10)) Settings.tele_period = 10;   // Do not allow periods < 10 seconds
-    tele_period = Settings.tele_period;
+    tele_period = Settings.tele_period;    
+    prep_called = false;
   }
   ResponseCmndNumber(Settings.tele_period);
 }