diff --git a/Shelly-1PM.md b/Shelly-1PM.md
index 02dc1993..a0b4a3bd 100644
--- a/Shelly-1PM.md
+++ b/Shelly-1PM.md
@@ -13,9 +13,6 @@ The GPIOs on the Shelly are connected to AC power!** Only use a Shelly as design
 **Do not connect AC power and the serial connection at the same time**
 The GND connection of the Shelly is connected to the live AC wire. Connecting serial with your PC will fry your PC.
 
-**Check the correct jumper position before connecting AC power to Shelly 1.**
-If the jumper is set to 12V you will destroy your Shelly!
-
 An ESP8266 with 2MB flash single relay device 42mm "round" in size.
 
 ## Serial Flashing