diff --git a/variants/esp32s3/m5stack_cardputer_adv/variant.h b/variants/esp32s3/m5stack_cardputer_adv/variant.h
index 5fdb1436e..48437cd13 100644
--- a/variants/esp32s3/m5stack_cardputer_adv/variant.h
+++ b/variants/esp32s3/m5stack_cardputer_adv/variant.h
@@ -9,6 +9,7 @@
 #define ST7789_BUSY -1
 // #define VTFT_CTRL 38
 #define VTFT_LEDA 38
+#define TFT_BACKLIGHT_ON HIGH
 // #define ST7789_BL (32+6)
 #define ST7789_SPI_HOST SPI2_HOST
 // #define TFT_BL (32+6)