diff --git a/config/printer-creality-ender3-v2-2020.cfg b/config/printer-creality-ender3-v2-2020.cfg
index a0ca79cbc..f7cfc873b 100644
--- a/config/printer-creality-ender3-v2-2020.cfg
+++ b/config/printer-creality-ender3-v2-2020.cfg
@@ -7,7 +7,7 @@
 # select "Enable extra low-level configuration options" and select
 # serial (on USART3 PB11/PB10), which is broken out on the 10 pin IDC
 # cable used for the LCD module as follows:
-# 3: Tx, 4: Rx, 9: GND, 10: VCC
+# 3: Tx, 4: Rx, 9: GND, 10: VCC (pins 3 & 4 may need to be crossed depending on host board)
 
 # Flash this firmware by copying "out/klipper.bin" to a SD card and
 # turning on the printer with the card inserted. The firmware