diff --git a/Config.h b/Config.h
index 3cb1103..fb53f5f 100644
--- a/Config.h
+++ b/Config.h
@@ -61,7 +61,7 @@
 // Enable Nextion LCD serial port repeater on USART2 (ZUMspot Libre Kit and ZUMspot RPi):
 // #define SERIAL_REPEATER
 
-// Enable Nextion LCD serial port repeater on USART1:
+// Enable Nextion LCD serial port repeater on USART1 (Do not use with STM32_USART1_HOST enabled):
 // #define SERIAL_REPEATER_USART1
 
 // Enable P25 Wide modulation